Version 1.3 release.

Updates CHANGELOG, version, docs.
diff --git a/docs/dyn/gmail_v1.users.drafts.html b/docs/dyn/gmail_v1.users.drafts.html
index 019f262..a63aaee 100644
--- a/docs/dyn/gmail_v1.users.drafts.html
+++ b/docs/dyn/gmail_v1.users.drafts.html
@@ -132,7 +132,7 @@
     "sizeEstimate": 42, # Estimated size in bytes of the message.
     "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
         # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
         # - The Subject headers must match.
     "labelIds": [ # List of IDs of labels applied to this message.
       "A String",
@@ -174,7 +174,7 @@
       "sizeEstimate": 42, # Estimated size in bytes of the message.
       "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
           # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-          # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+          # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
           # - The Subject headers must match.
       "labelIds": [ # List of IDs of labels applied to this message.
         "A String",
@@ -205,6 +205,7 @@
   format: string, The format to return the draft in.
     Allowed values
       full - 
+      metadata - 
       minimal - 
       raw - 
 
@@ -238,7 +239,7 @@
       "sizeEstimate": 42, # Estimated size in bytes of the message.
       "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
           # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-          # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+          # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
           # - The Subject headers must match.
       "labelIds": [ # List of IDs of labels applied to this message.
         "A String",
@@ -292,7 +293,7 @@
           "sizeEstimate": 42, # Estimated size in bytes of the message.
           "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
               # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-              # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+              # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
               # - The Subject headers must match.
           "labelIds": [ # List of IDs of labels applied to this message.
             "A String",
@@ -355,7 +356,7 @@
     "sizeEstimate": 42, # Estimated size in bytes of the message.
     "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
         # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
         # - The Subject headers must match.
     "labelIds": [ # List of IDs of labels applied to this message.
       "A String",
@@ -396,7 +397,7 @@
     "sizeEstimate": 42, # Estimated size in bytes of the message.
     "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
         # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
         # - The Subject headers must match.
     "labelIds": [ # List of IDs of labels applied to this message.
       "A String",
@@ -442,7 +443,7 @@
     "sizeEstimate": 42, # Estimated size in bytes of the message.
     "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
         # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
         # - The Subject headers must match.
     "labelIds": [ # List of IDs of labels applied to this message.
       "A String",
@@ -484,7 +485,7 @@
       "sizeEstimate": 42, # Estimated size in bytes of the message.
       "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
           # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-          # - The References and In-Reply-To headers must be set in compliance with the <a href="https://tools.ietf.org/html/rfc2822"RFC 2822 standard.
+          # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
           # - The Subject headers must match.
       "labelIds": [ # List of IDs of labels applied to this message.
         "A String",