Merge pull request #1 from wesnoth/master

Test
Fixing a typo (error).
Correcting some errors and restoring the standalone version.

Standalone version is managed by the compile flag YAMG_STANDALONE.
This flag is defined only in a separate target not present in the Wesnoth project,
so it can't interfere with Wesnoth builds.
So please, don't edit the sections within the #ifdef YAMG_STANDALONE.
Merge pull request #57 from Pyrophorus/wesnoth-yamg

Wesnoth yamg
Convert some space indentation to tabs
Merge pull request #56 from Gallaecio/gl

[Galician Translation] Updated map localization of “An Orcish Incursion”...
Long overdue XCode projfile update
vc project update
Removed a trailing parenthesis at the end of a string that made no sense there.
Fix CodeLite project file to work with GDB.
Update CodeLite project file.
Merge pull request #59 from Gallaecio/i18n

Removed a trailing parenthesis at the end of a string that made no sense...
Merge pull request #60 from Gallaecio/gl

[Galician Translation] Review of the tutorial, affecting other modules a...
Merge show_wml_errors() and show_wml_message().
Collect some parts of pump.cpp into a new class (context).

This has no immediate benefit other than organizing things.
Maybe it will help someone do something someday.
Refactor static_wml_actions as class wml_action.

It's a bit more C++-like, but more importantly puts related static
variables in the same file (so this should cure the static
initialization fiasco known as bug #21020).
Fixed paths to stonebridge and tropical forest icons in their respective help topics
Fixed image path of last frame in Elvish Outrider ranged anim (pointed out by bumbadadabum)
Added a notification when toggling accelerated speed
Allowed [modify_side] to modify the scroll_to_leader key