Some string fixes.
Fixed a typo.
Fixed crash in creating user screen, which occured after rename player.

It's a bit quick and lazy fix. Probably other variables should be cleared too.
Remove unecessary files.
Fix memory leak found by vlj
Fix build
Removed ngettext, because tinygettext can't handle it.
Merge pull request #1847 from gunchleoc/master

Some string fixes.
Move all gfx related config to a separate file
Used #ifndef in header.txt
Factorise MRP
Factorize (and fix) gaussian weight computation