Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/dyn/compute_v1.sslCertificates.html b/docs/dyn/compute_v1.sslCertificates.html
index e2fec84..79fe9fd 100644
--- a/docs/dyn/compute_v1.sslCertificates.html
+++ b/docs/dyn/compute_v1.sslCertificates.html
@@ -144,7 +144,7 @@
     },
     "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
     "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
-    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. If creating a persistent disk snapshot, this points to the persistent disk that the snapshot was created from.
+    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
   }</pre>
 </div>
 
@@ -163,7 +163,7 @@
       "kind": "compute#sslCertificate", # [Output Only] Type of the resource. Always compute#sslCertificate for SSL certificates.
       "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression [a-z]([-a-z0-9]*[a-z0-9])? which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
       "certificate": "A String", # A local certificate file. The certificate must be in PEM format. The certificate chain must be no greater than 5 certs long. The chain must include at least one intermediate cert.
-      "privateKey": "A String", # A write-only private key in PEM format. Only insert RPCs will include this field.
+      "privateKey": "A String", # A write-only private key in PEM format. Only insert requests will include this field.
       "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
       "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
       "selfLink": "A String", # [Output only] Server-defined URL for the resource.
@@ -184,7 +184,7 @@
     "kind": "compute#sslCertificate", # [Output Only] Type of the resource. Always compute#sslCertificate for SSL certificates.
     "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression [a-z]([-a-z0-9]*[a-z0-9])? which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
     "certificate": "A String", # A local certificate file. The certificate must be in PEM format. The certificate chain must be no greater than 5 certs long. The chain must include at least one intermediate cert.
-    "privateKey": "A String", # A write-only private key in PEM format. Only insert RPCs will include this field.
+    "privateKey": "A String", # A write-only private key in PEM format. Only insert requests will include this field.
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
     "selfLink": "A String", # [Output only] Server-defined URL for the resource.
@@ -238,7 +238,7 @@
     },
     "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
     "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
-    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. If creating a persistent disk snapshot, this points to the persistent disk that the snapshot was created from.
+    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
   }</pre>
 </div>
 
@@ -275,7 +275,7 @@
           "kind": "compute#sslCertificate", # [Output Only] Type of the resource. Always compute#sslCertificate for SSL certificates.
           "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression [a-z]([-a-z0-9]*[a-z0-9])? which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
           "certificate": "A String", # A local certificate file. The certificate must be in PEM format. The certificate chain must be no greater than 5 certs long. The chain must include at least one intermediate cert.
-          "privateKey": "A String", # A write-only private key in PEM format. Only insert RPCs will include this field.
+          "privateKey": "A String", # A write-only private key in PEM format. Only insert requests will include this field.
           "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
           "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
           "selfLink": "A String", # [Output only] Server-defined URL for the resource.