applied utils/wesnoth-optipng

Overall statistics (only for files with a smaller recompressed size):
  Original size: 16720 KiB on 404 files
 Optimized size: 15237 KiB
   Total saving: 1482 KiB = 8% decrease
updated French translation
updated Lithuanian translation
pot-update and regenerated doc files
Code formated.
Fix spelling in a comment.
Another spelling fix in a comment.
Make travis a bit less verbose
Don't leak busy cursors
[Mispell] have lead → have led
Fix some wrong spelling, mostly in comments.
Merge pull request #33 from Gallaecio/led

[Mispell] have lead → have led
More spelling fixes :-P
Merge branch 'gl' of git://github.com/Gallaecio/wesnoth-old into master
Merge branch 'master' of github.com:wesnoth/wesnoth-old
Have the Ranger's sword attack use SOUND_LIST:SWORD_SWISH instead of dagger-swish.wav; work from bumbadadabum.
Don't show various interface elements on the map when you can't interact

Part of bug #16350 by eleazar.
Always show the ellipse for selected units

Part of bug #16350 by eleazar.
Don't allow selections when commands are disabled
Select the hex of the speaker

Last part of bug #16350 by eleazar.