add Soundcloud oauth2 provider
use soundcloud username as lastname instead as fullname fallback
Merge branch 'oauth2-provider-soundcloud' of https://github.com/amertum/securesocial into amertum-oauth2-provider-soundcloud

Conflicts:
	module-code/app/securesocial/core/RuntimeEnvironment.scala
	samples/java/demo/conf/securesocial.conf
Merge branch 'amertum-oauth2-provider-soundcloud'