Added service to run operations and created SyncOperations as common class for operations that work both both with remote and local storage
Moved execution of GetSharesOperation to OperationsService
Updated link to ownCloud library
Merge branch 'share_link_show_shared_files' into bug_in_refresh_of_shared_state_when_device_is_rotated
Merge pull request #370 from owncloud/bug_in_refresh_of_shared_state_when_device_is_rotated

Fixed bug in refresh of list of files with shares when device is rotated