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
Merge branch 'share_link_show_shared_files' into share_link__new_share
OC-2678: Save the new Share resource in the Shares database
OC-2677: Update library
OC-2677: Add GetSharesForFile operation
OC-2771: Add pop-up message if the server doesn't support Share API and Share Link option is selected
OC-2772:Display a message if the user selects to share a file or folder that does not exist on the server
Merge branch 'share_link__new_share' into share_link__new_share_menu
Added filtered chooser dialog for activities that can receive a link