Merge pull request #165 from michaelhidalgo/3.6_Dev

Backend changes to return user friendly error messages
This commit fixes backend changes for :
1.Login
2.Signup
3.Change Password
4.Reset Password.

Issues:
1. https://github.com/TeamMentor/Master/issues/926
2.https://github.com/TeamMentor/Master/issues/171
3.https://github.com/TeamMentor/Master/issues/303
4.https://github.com/TeamMentor/Master/issues/267
5.https://github.com/TeamMentor/Master/issues/363
6.https://github.com/TeamMentor/Master/issues/773
Minor change to remote Resharper Annotation
Merge pull request #166 from michaelhidalgo/Issue_303_ChangePassword_UserFriendlyMessages

Backend changes : Login, Signup,Reset Password, Change Password