Updated Spanish translation
lua.lang: added goto and label support

https://bugzilla.gnome.org/show_bug.cgi?id=738879
lua.lang: added mode and metatable methods

And updated Lua's global functions to Lua 5.2.

https://bugzilla.gnome.org/show_bug.cgi?id=738879
Updated Russian translation
lua.lang: improve escape regex

List of valid escape strings taken from
http://www.lua.org/work/doc/manual.html (3.1 - Lexical Conventions).

https://bugzilla.gnome.org/show_bug.cgi?id=738971
encoding: more robust GVariant parsing

Translations cannot be trusted, so make the code more robust to parsing
errors.

Thanks to Марко М. Костић for the bug report.

https://bugzilla.redhat.com/show_bug.cgi?id=1155810
Fix Serbian translation

https://bugzilla.redhat.com/show_bug.cgi?id=1155810
yacc.lang: handle multidigit semantic values

A semantic value $n can have any number of digits. Highlight the entire
value, not just the first digit.

https://bugzilla.gnome.org/show_bug.cgi?id=739155
Release 3.15.1
Post-release version bump
Syntax highlighting and test file for Apache Pig 0.12

https://bugzilla.gnome.org/show_bug.cgi?id=735319
engine: improve a little the comments

And don't align struct field's names, it was probably painful to keep
right, and there were problems.
engine: line-up function parameters
engine: remove unused error type
Use GtkTextView:monospace property

gtk_widget_override_font() is deprecated.
build: GTK+ >= 3.15.0 is required

Because the GtkTextView:monospace property is used.
build: dependencies more at the top of configure.ac

So that the top of configure.ac contains all the important stuff that is
often changed.

The Libtool versioning is changed only once every six months, but it's
important to not forget it, so it's still at the top too. (and the algo
to change the libtool versioning comes actually from the GNU
documentation, which was copied in the Autotools book).
Change Finnish translation team web page to l10n.gnome.org
Updated Hebrew translation
cuda.lang: reorganize the file and fix indentation