Merge pull request #25 from Gallaecio/gl

Updated the Galician (gl) translation.
Fix the spelling in a comment.
Merge AI-demo and mainline experimental recruit logic

Slight speed improvement when close to unowned vilages. Correct score
for time of day damage estimates for encountering the enemy near end of
game.
Updated artwork for the hero/leader/loyal status icons

Reduced slightly the size of the icons so that the energy bars could be nudged back up
New artwork and TC ranges for team color-able icon bases and cursor hexes

The icon bases are meant for use with the terrain type icons and unit profile icons.
Team color-able hexes offer a flexible alternative to  single-color cursor components.
A set of color ranges specifically tailored for terrain type icons has been added to team-colors.cfg. Each color range is named after the base terrain type it corresponds to.
Recolor new hex cursors for yours/enemy/ally/empty
Make Experimental AI available in MP and SP

This is done through a new macro EXPERIMENTAL_AI.  Previously, it was
only available as a multiplayer AI.
[Changelogs] The Galician (gl) translation has been updated.
Updated the Galician translation of desktop integration files.
Some work on the Galician translation of wesnoth-utbs, and review of some related strings.