Italian translation updated
Merge pull request #287 from bartokk/master

Italian translation updated
Add Greek (el_GR) translation
Add el_GR translation files
minor adjustments to translated strings.
Update Greek translation.
Remove Greek .mo
Merge pull request #288 from jinxos/gr_translation

Greek translation (el_GR)
usermanual: a bunch of minor corrections and updates
disable lua in a more radical way to end the foot-shooting party.