Added functionality for inserting subjects into corresponding tables for tutors/students
Minor changes
   * Reformatted tutor home layout
   * Removed checkboxes in student setup
   * Added log out functionality to action bar
Merge branch 'queenie' of github.com:queeniema/Edufi into queenie
Added "Find Tutors" fragment
   * Displays Google Map
   * Puts marker at current location
   * Prompts user to go to settings if GPS/network is not enabled