Added gfx_invalidate_window
Remove duplicate function. Change comment to prevent repeat
Added more cheat strings to load from language file
Merge pull request #281 from duncanspumpkin/cheats_string

Added more cheat strings to load from language file
Merge pull request #280 from duncanspumpkin/gfx_invalidate_window

Added gfx_invalidate_window
Initial Dutch translation (not yet complete)
Merge pull request #282 from Gymnasiast/master

Initial Dutch translation (not yet complete)