diff --git a/go.sum b/go.sum
index 3520949..6e0affc 100644
--- a/go.sum
+++ b/go.sum
@@ -38,6 +38,7 @@
 contrib.go.opencensus.io/exporter/stackdriver v0.12.4/go.mod h1:fmn/xkyUfUhd1iD7Ic+HSN8y11KhSK5oe8CWfSjKa7M=
 contrib.go.opencensus.io/exporter/stackdriver v0.12.5/go.mod h1:8x999/OcIPy5ivx/wDiV7Gx4D+VUPODf0mWRGRc5kSk=
 contrib.go.opencensus.io/exporter/stackdriver v0.12.6/go.mod h1:8x999/OcIPy5ivx/wDiV7Gx4D+VUPODf0mWRGRc5kSk=
+contrib.go.opencensus.io/exporter/stackdriver v0.12.7/go.mod h1:ZOhmSfHIoyVaQ+bKN+lR4h7K2olTIJsrdOwWHsNGw4w=
 contrib.go.opencensus.io/resource v0.0.0-20190131005048-21591786a5e0/go.mod h1:F361eGI91LCmW1I/Saf+rX0+OFcigGlFvXwEGEnkRLA=
 contrib.go.opencensus.io/resource v0.1.1/go.mod h1:F361eGI91LCmW1I/Saf+rX0+OFcigGlFvXwEGEnkRLA=
 contrib.go.opencensus.io/resource v0.1.2/go.mod h1:F361eGI91LCmW1I/Saf+rX0+OFcigGlFvXwEGEnkRLA=
@@ -130,6 +131,7 @@
 github.com/aws/aws-sdk-go v1.23.13/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.23.14/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.23.15/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.23.16/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -255,6 +257,7 @@
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/addlicense v0.0.0-20190510175307-22550fa7c1b0/go.mod h1:QtPG26W17m+OIQgE6gQ24gC1M6pUaMBAbFrTIDtwG/E=
 github.com/google/btree v0.0.0-20160524151835-7d79101e329e/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -650,6 +653,8 @@
 go.chromium.org/luci v0.0.0-20190904011534-e1dd9ee71e1e/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.chromium.org/luci v0.0.0-20190905000638-711a45728aed h1:J6z44UXLIsMuFR2ray99wuA9a6SBTyPyZIbYci3Vwqg=
 go.chromium.org/luci v0.0.0-20190905000638-711a45728aed/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
+go.chromium.org/luci v0.0.0-20190906003230-2b8b37b10d7f h1:BmYXQL9UWc07Pdly8mKNYg2tOP2QXQgrUz1Z85l2Hm4=
+go.chromium.org/luci v0.0.0-20190906003230-2b8b37b10d7f/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@@ -794,6 +799,8 @@
 go.skia.org/infra v0.0.0-20190903221443-b46a3abc6a6f/go.mod h1:cS7GJaDzmbvzw6Cdu1FFa0zQSd4zlEmbps/l56GPw8k=
 go.skia.org/infra v0.0.0-20190904234701-edf50e673a95 h1:FVLB9Tkv1ieXji1PwwUIZQzEi6rmdY6qUDwzuHIoBVg=
 go.skia.org/infra v0.0.0-20190904234701-edf50e673a95/go.mod h1:IWATgZFv2e7iGp0oI55xMxJhGgqZA8epWUz3Cb2dqDs=
+go.skia.org/infra v0.0.0-20190906034009-55d738215c86 h1:Dt9G58fWvKciMiJM8lji6Q1jQw+7Z89nxBrpagFXSuo=
+go.skia.org/infra v0.0.0-20190906034009-55d738215c86/go.mod h1:C8R3VWaZnQOYwvWzIBbEUJBLbRcTy3fj+jmpSYzUqUs=
 go.skia.org/skia v0.0.0-20190503181046-70aab823547a h1:+9xKwnzXTkTu+2ZVhffRu0A60Jx/gOETiNlKkzqbnRY=
 go.skia.org/skia v0.0.0-20190503181046-70aab823547a/go.mod h1:oVrxmr1FXbVQ7PeGtZ28Kg5wPvB+bNsnw1n2j5rtfTY=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
@@ -1112,6 +1119,8 @@
 golang.org/x/tools v0.0.0-20190903163617-be0da057c5e3/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190905035308-adb45749da8e h1:UboUef6L2TaPy4CYJLNCvM9TkgCD8JbbUi5wrvhkxww=
 golang.org/x/tools v0.0.0-20190905035308-adb45749da8e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190905235650-93dcc2f048f5 h1:xU4gBaA7ny56EkBSp9Uw2MVovJDupIfONnEOZ+FChTY=
+golang.org/x/tools v0.0.0-20190905235650-93dcc2f048f5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools/gopls v0.1.0/go.mod h1:p8Q0IUu6EEeGxqmoN/g6Et3gReLCGA7PtNRdyOxcWJE=
 golang.org/x/tools/gopls v0.1.1/go.mod h1:RYlHDmWjvTa1HuWNyEKa6/zzI2ums47cfsozmM0466w=
 golang.org/x/tools/gopls v0.1.3/go.mod h1:vrCQzOKxvuiZLjCKSmbbov04oeBQQOb4VQqwYK2PWIY=
@@ -1130,6 +1139,8 @@
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/api v0.9.0 h1:jbyannxz0XFD3zdjgrSUsaJbgpH4eTrkdhRChkHPfO8=
 google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.10.0 h1:7tmAxx3oKE98VMZ+SBZzvYYWRQ9HODBxmC8mXUsraSQ=
+google.golang.org/api v0.10.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -1167,6 +1178,8 @@
 google.golang.org/genproto v0.0.0-20190817000702-55e96fffbd48/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190905072037-92dd089d5514 h1:oFSK4421fpCKRrpzIpybyBVWyht05NegY9+L/3TLAZs=
+google.golang.org/genproto v0.0.0-20190905072037-92dd089d5514/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.19.1/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
@@ -1243,6 +1256,7 @@
 k8s.io/api v0.0.0-20190830034750-63b8484e5766/go.mod h1:ZPzpiABYnAONRNqslkGU1hppe1VEXgsEJlFRIbP75G8=
 k8s.io/api v0.0.0-20190830074751-c43c3e1d5a79/go.mod h1:ZPzpiABYnAONRNqslkGU1hppe1VEXgsEJlFRIbP75G8=
 k8s.io/api v0.0.0-20190831074750-7364b6bdad65/go.mod h1:u09ZxrpPFcoUNEQM2GsqT/KpglKAtXdEcK+tSMilQ3Q=
+k8s.io/api v0.0.0-20190905160310-fb749d2f1064/go.mod h1:u09ZxrpPFcoUNEQM2GsqT/KpglKAtXdEcK+tSMilQ3Q=
 k8s.io/apimachinery v0.0.0-20190424212440-527a9d33701e/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=
 k8s.io/apimachinery v0.0.0-20190425132440-17f84483f500/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=
 k8s.io/apimachinery v0.0.0-20190430211124-5bae42371a56/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=