Completed functions in DataFacade
filled login&register functions in AppFacade
added a function to get Credentials out of sharedpreferences to AppFacade
added HTTP-DELETE to the RESTClient
switch MainActivity logout to AppFacade logout
added strings for handling no connection
Added a timer thread to cancel a login attempt if it takes too long
switch to a Sha1 hashing algorithm
Merge pull request #43 from XiDevelopment/DataFacade

Completed functions in DataFacade