Added some plugin related styles

Customize by adding rules to www/anno/custom/home.css
[Server] Checking for circle level before creating an anno
Added custom css file to Draw Template page
Merge branch 'develop' of github.com:usersource/anno into develop
Merge branch 'develop' of github.com:usersource/anno into feature/plugin-server
[Android] Added cordova call to find if application is using as plugin
[Client] Checking if app is using as plugin or not at startup
Added sample custom styling files to sample_custom directory

Use these files as guidelines for styling for the plugins
Styling files must go into www/anno/custom folder
Please update these files as necessary
[Server] Imported 'validate_team_secret'
Some comments in the sample styling files
[Client] Added plugin user authentication
[Client] Modified 'setDefaultServer' to select different server
[Server] Updated 'auth_user' to authorize plugin user
[Client] Updated to authorize plugin user
[Client] Not initializing PushNotification service if using as plugin
Merge branch 'develop' of github.com:usersource/anno into feature/plugin-server