taskwarrior: Update to version 2.2.0.

This update roughly includes the following changes:

 * Spanish es-ES translation
 * New configuration option: print.empty.columns
 * Much improved Asian character support
 * More virtual tags
 * Improved bash completion
 * Task modification time
 * Stats show blocked and blocking tasks
 * New 'blocking' report
 * Additional color rules
 * New helper commands for third-party tools
 * 'columns' command searchable
 * New date shortcuts 'socm' and 'eocm'
 * Improved push/pull messages

For a full list of changes, please head over to:

http://taskwarrior.org/projects/taskwarrior/wiki/Changelog



Signed-off-by: aszlig <aszlig@redmoonstudios.org>