updated podspec for new version
Merge remote-tracking branch 'instructure/CanvasKit/master'

Conflicts:
	CanvasKit.podspec
Merge remote-tracking branch 'instructure/CanvasKit/master'
Moves the cookie clearing to please everyone

moves the sessions removal code so that all the different
logins will succeed.
Merge pull request #145 from derrh/master

Fixes the cas login issue