New dropbox app. updated key, secret redirect url
In case when user is authorized only with cloud service, he doesn't have login and password
Sketch of authentication with dropbox service
- Removed redundant check, in any way session will be overridden
- Code cleaning
Dropbox authorization url provided by server.
Dropbox API moved to separate controller, added acountRemove
Added getUser controller, added redirection when user authenticated with dropbox
Fix, processing error, when code not passed
- drive authentication, removing
- Tests fix for dropbox/drive remove
debug
Merge remote-tracking branch 'remotes/origin/4_managing_cloud_services'

Conflicts:
	conf/routes