Merge tag 'upstream/0.4.5+dfsg'
Merge tag 'upstream-minetest-game/0.4.5'
Add the minetest-data package.
Update debian/minetest-common.install
Update patches
Upstream now keeps its icons in misc/
Use upstream manpages.
Remove useless dependencies and update build dependencies in debian/control
Updated debian/watch
Fix minetest-game-full image permissions (lintian)
Cleaned up debian/copyright (lintian):

 - Upstream changed to LGPL-2+ for most of their code
 - Added missing files
minetest-common declares breaks+replaces with minetest
Upstream added a class "Event" to their jmutex.h, put this class into event.h
Make this debian/0.4.5+dfsg-0.1