Added anlytics tracking code/file and the init function.
Finished V1 with all the custom dimesions added.
Added metric for used graph and used layer
Bug fix where metrics werent recogised.
Updated the example_config to allow custom metrics
Added comments
Set Analytics to disabled by default
Converted tabs into 3 spaces as per the standard
Update the readme file to include GA setup steps and changined the the custom definiation indexes around.