pot-update and regenerated doc files (prepare for 1.11.4)
bump version to 1.11.4
New artwork for checkbox and radiobox buttons
post release version bump to 1.11.4+dev
Fix castles being wrongly singnaled as keeps.
Enable the tooltips for the editor tools.
Fix the non working swap palette icon action.
Enabled and adjusted the tooltip for the swap palette item action.
Update the tooltips of the unit and village tool.
Tooltip for the time schedule menu button.
Editor: Added labels to the unit tooltip.
removing misplaced icon files
New artwork for status icons
New artwork for the editor palette: unit groups icons
UtBS Out of the Frying Pan: Use Messenger Escort Micro AI for messenger side

The scenario was still using an old version of the AI code.  Fixes the
error reported on the forum at
http://forums.wesnoth.org/viewtopic.php?t=38806
Also correct the goal hex for the messenger units, as they were heading
to the wrong location.
Changed location_set.of_pairs() to work with different formats of x,y coordinate tables.
Changed healer support mai to use new location_set.of_pairs() method to create avoid_map.