bump version to 2.81+

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14129 f4695dd4-2c0a-0410-b89c-da849a56a58e
add tr_sessionGetTorrents(), a private utility to avoid code duplication in libtransmission

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14130 f4695dd4-2c0a-0410-b89c-da849a56a58e
(trunk, gtk) #5430: periodic update timer in 'Torrent > Set Location...' should be cleared immediately when dialog is closed.

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14131 f4695dd4-2c0a-0410-b89c-da849a56a58e
use consistent code indentation/whitespace in open dialog, file list, and set location dialog

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14132 f4695dd4-2c0a-0410-b89c-da849a56a58e
(trunk gtk) use G_SOURCE_REMOVE where appropriate

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14133 f4695dd4-2c0a-0410-b89c-da849a56a58e
(trunk, libT) #5429 'nightly build crashes on webseed torrents' -- fixed.

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14134 f4695dd4-2c0a-0410-b89c-da849a56a58e
(trunk, libT) #5426 'Crash when adding UDP tracker with a large number of characters in the tracker URL' -- fixed.

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14135 f4695dd4-2c0a-0410-b89c-da849a56a58e