Added optional reason to the ignore feature.

In multiplayer, this supports players to associate a reason with ignored users that is displayed with the ignored username. Resolves http://wiki.wesnoth.org/EasyCoding#Add_possibility_to_give_reason_for_.22ignore.22.
Improved friends storage system to store "acquaintances" as separate children.

The current attributes are status (either friend or ignore), the nickname, and any attached notes.
Don't need to escape the reason anymore with new storage system.
Added notes for friends.
We're not using svn anymore
Renamed the icons for the time switch action properly.
Time and Schedule selection in the editor.
Also replace '+svn' with '+dev' in wesconfig.h

Caught by anonymissimus
Added ability for Healer Support mai to avoid certain tiles based on standard ai avoid aspect.
Merge pull request #10 from jleldridge/master

Allow Healer Support MAI to use [avoid] aspect to avoid locations.
Update changelog
Set the color adjustment on schedule switch.
Images for the switch time action.
Updated artwork for sliders, including 2 new types of slider. All slider artwork is regrouped into the subfolder images/buttons/sliders
Optiping run

Overall statistics (only for files with a smaller recompressed size):
  Original size: 66 KiB on 51 files
 Optimized size: 39 KiB
   Total saving: 27 KiB = 40% decrease
Change path to the new slider artwork.
Adjust pathes to the new slider artwork in gui2.
Updated backgrounds for the editor UI at 1024*768 (minimap with zoom slider)
Adjust new Minimap with embedded slider.
Fix spelling in a comment.