EMI: Add specific detection for German Mac EMI
EMI: Add code for loading local.m4b from the german EFMI Installer file.
EMI: Add MD5 verification of the EFMI Installer file for german EMI
DOCS: Mention the necessary "EFMI Installer" file in Readme.md
EMI: Cache the entire contents of local.m4b to speed up the launch of the Mac version.

I did not remove the adding of local.m4b to SearchMan, as that for some reason blocked a few files from loading.
EMI: Add MD5 verification for the english mac installer thanks to clone2727
EMI: Add code for one-shot playing the Aspyr logo on EMI Mac

This needs to be separate from the other videos, since the logo
is encoded as QuickTime. This solution replicates logic from
mainLoop to avoid adding any further special cases in engine code.
GRIM/EMI: Handle 32bpp BGR in gfxOpenGL::prepareMovieFrame

This fixes the display of the Aspyr Logo in OpenGL.
Merge pull request #1097 from somaen/emiMac

EMI: A first set of patches to improve Mac-support (German only)