Add bug fixes for milestone4

[nishanbose]

1. [Medium] All external links should open a new window #179
2. [Medium] Requesting new password for deactivated account works #182
3. [Low] Add username to profile page #158
4. [Low] Contact support email should open a new window #155
5. Add admin interface to monitor mongodb database #147
6. [Urgent] Job Title and Job Description should be required for uploading resumes #187
7. [High] Invalid registration errors when entering fake location #180
8. [Urgent] Registering a previously deactivated account results in error #181
9. [Feature Request] Volunteers should receive notification when resumes are available to review #61