Island hopping: "New Objectives" changed to "New Objective"
Improved translator comments
Unlocalized a string in soldier.cc
More translator comments
Various small string fixes
3 more string fixes
Added a translator comment
Unlocalized Barbarian Stronghold, c.f. https://bugs.launchpad.net/widelands/+bug/787508
Changed tree size terms from _/ medium/small/tiny to Old/Mature/Pole/Sapling
small cleanup: don't dupplicate strings from MilitarySite_Desc to MilitarySite
Fixed some strings in campaigns
Cleaned up code to comply with code checks
Fixed inconsistent spelling of cattle farm
Replaced placeholders with string literals in Battle Arena and Training Camp to avoid gender issues with the article.
Fixed bug where building statistics - "% built" was not localized.
Change Overlay_Manager_Callback to be a boost::function.
Remove Overlay_Manager.reset() and instead recreate the class.
Made build progress translatable.
Article problems with translations.
Sort languages by their native name.
Codestyle fixes.