sessionsController update
Merge branch 'stephbranch' of github.com:lewisren/FuelEd into stephbranch

Conflicts:
	app/controllers/sessions_controller.rb
added RANK to users model
added RANK to users model
rebased with lewbranch; User rank functionality merged with dropdown selector in signup page
committing merges after rebasing with lewbranch and merging updated User model (with rank) and lewbranch's type drop-down selector in signup page
added information to appointments homepage
added rspec tests, edited formatting for apptcontroller, changed create appt link for appt index view
Merge branch 'stephbranch' of https://github.com/lewisren/FuelEd into stephbranch