Deprecate API Legacy

[aneesh-neelam]

Will be deprecating API Legacy as it no longer works due to #79.
Adding mobile number will require a major rework, which eventually will make it identical to API v2.

There will be a new status code for 'Feature Deprecated'.

[aneesh-neelam]

This is now done. All requests to API Legacy endpoints will now return:

{
  "status": {
    "message": "This feature or endpoint has been deprecated, please contact the VITacademics developers for more information",
    "code": 60
  }
}