Updated German translation
Add i18n comments to NACT user's manual

Fix #667429 Are this strings translatable ?
Reported by Daniel Mustieles.
Updated Spanish translation
Include a hacked version of gnome-doc-utils.make

Fix #672269 - Add check for xml2po (gnome-doc-utils) in configure
reported by Robert Waters.
See rationale in docs/nact/gnome-doc-utils-na.make.
Updated German help translation and added all screen-shots
Updated Brazilian Portuguese translation
Added Serbian translation
[l10n] Update Catalan translation
Updated Greek translation
Move history to ChangeLog-2012
Bump copyright year
Updating TODO
Obsoletes g_type_init() starting with glib 2.36
Remove useless blank lines from src/nact/base-gtk-utils.c