add 'CanCan' to gem file
add working 'CanCanCan' gem
add * for required fields in sign in and up
add user abilities
define abilities
define abilities
add bitmask gem
add roles to users table
Merge branch 'master' of https://github.com/swells9703/cvtcrideshare into susan-master

Conflicts:
	db/development.sqlite3
	db/schema.rb
Adds susans user role gems
Merge branch 'master' of https://github.com/vandise/cvtcrideshare into quang-commit