Added Dropbox support
Added DropboxProvider in examples
Updated logging and no longer autocompute first and last names from full name
Merge branch 'master' of github.com:deterdw/securesocial into deterdw-master

Conflicts:
	samples/java/demo/conf/play.plugins
	samples/scala/demo/conf/play.plugins
Merge branch 'deterdw-master'
- Merged pull request #393: Dropbox support (thanks @deterdw)
- Embedded OAuth2Settings into OAuth2Client