Version 1.3 release.

Updates CHANGELOG, version, docs.
diff --git a/docs/dyn/games_v1.applications.html b/docs/dyn/games_v1.applications.html
index d979a7d..768203c 100644
--- a/docs/dyn/games_v1.applications.html
+++ b/docs/dyn/games_v1.applications.html
@@ -107,6 +107,7 @@
     "description": "A String", # The description of the application.
     "author": "A String", # The author of the application.
     "lastUpdatedTimestamp": "A String", # The last updated timestamp of the application.
+    "themeColor": "A String", # A hint to the client UI for what color to use as an app-themed color. The color is given as an RGB triplet (e.g. "E0E0E0").
     "name": "A String", # The name of the application.
     "instances": [ # The instances of the application.
       { # This is a JSON template for the Instance resource.