sumit: verification model added for email verification and md_register and md_login modified
model for md_login and md_register
Merge branch 'master' of https://github.com/harshitism/social_calender

Conflicts:
	application/controllers/Login.php
	application/controllers/Register.php
	application/controllers/verification.php
	application/models/md_login.php
	application/models/md_register.php