GRIM: Disallow changing of hardware acceleration modes if Opengl is not enabled
GRIM: Fix switching fullscreen crashing with tinygl
GRIM: Reduce code duplication.
GRIM: Add on-screen console debugger
GRIM: Improve error message
GRIM: Make TextSplitter tell the file name on error
GRIM: Add a md5 check on the game data files
GRIM: Add a debugger command to check the game data files
GRIM: Improve MD5 checking messages
Merge pull request #717 from giucam/md5

GRIM: Check the md5 of the game data files
GRIM: Fix two md5sums for the italian unpatched version
GRIM: Forgot one md5 sum.
GRIM: Pause iMuse and the movie when pausing the engine
GRIM: Delete _debugger when shutting down
GRIM: Fix the md5 of vox0001.lab of italian version
GRIM: Add the md5s of english patched version
GRIM: Add the MD5 sums for the german unpatched version
GRIM: Add the MD5s of french unpatched
CONFIGURE: Fix build under et_EE locale

Freetype-config reports a broken include dir
when et_EE locale is used. We set LC_ALL
and LANGUAGE to "C" explicitly like autoconf
does to force consistent behavior.

From ScummVM's b65365e0d314bff91f5fb3c4fbdd3da7944ea7a2
GRIM: Don't overshoot walk nodes. Fix #699