Fixed bug which prohibited creating databases on FTP/HTTP/WebDav (no credentials were queried)
Fixed bug which prohibited to use the Android 4.4 KITKAT file picker
Removed permission for internal file browser to allow using the internal picker in 4.4 as well (Security Exception)
* scheme (protocol) is always contained in path variables passed to JavaFileStorage implementors
* file chooser improvements (internal browser displayed also in file chooser list e.g. when selecting an attachments, compatible with Solid Explorer content uris, removed OI stuff)
* started GDrive support
* Changed TestCacheSupervisor for easier use of the many callbacks
* Adapted tests for new callbacks
* GroupBaseActivity: Added sync menu command
* Preferences: Added option to enable/disable offline caching
* App: don't lock database when user wants to reload. This is done in PasswordActivity and should be done there after the password was filled into the pw field
* CheckDatabaseForChanges.cs: used when syncing a non-cached database