sets current user
creates signout path
fixes sessions destroy route
fixes merge conflict in routes, navbar
prompts user for profile_type after signing in
student or mentor is created automatically when user first signs up
moves validations from create to update
Merge branch 'master' of github.com:coreyd303/mentorSHIP into github-authentication

Conflicts:
	app/models/student.rb
	project_development
	spec/controllers/students_controller_spec.rb
mentors, students controller tests passing again
reformats student, mentor buttons on prompt page
fixes merge conflicts in Chad's branch that an earlier branch caused.
Merge pull request #49 from coreyd303/set-profile-type

Set profile type