Added and loaded HWIOAuthBundle
Configured OAuth to work with FOSUserBundle
Minor improvements and initial specs
Changes to make OAuth work
Fixed typo in provider name
Changed column name
Persist new user and ensure all required fields are not empty
Avoid empty email errors
Fixed email check
Fallback for blank email
Merge remote-tracking branch 'origin/feature/oauth'

Conflicts:
	app/config/config.yml
	composer.lock
	src/Kreta/CoreBundle/Resources/config/services.yml