Rename root config key for gApiAccess settings.

To make it less ambibuous in a world where 'verything is Google'.

See: xmlsquad/xml-authoring-library#4 (comment)

Author: john-arcus

XmlAuthoringProjectSettings.yaml.dist

@@ -1,5 +1,5 @@
 # The file can have any other parameters
-google:
+gApiAccess:
     gApiOAuthSecretFile: google-client-secret.json # The path to an application client secret file (relative to this file)
     gApiAccessTokenFile: google-access-token.json   # The path to an access token file (relative to this file, optional, the file may not exist)