Switched file icons against generated ones, added 32x32 versions
file icon updates

now we no longer limit generation to the extensions in mime types,
because file icons are used in downloadable code blocks, too.

All icons were regenerated with the latest update of the generator.
removed script, added README instead
moved 16x16 icons to their original locations

for backwards compatibility
fixed index file
updated file icons once more

adjusted some colors, added a few common extensions for codeblocks
adjusted the office type color again
Merge pull request #554 from splitbrain/fileicons

Switched file icons against generated ones, added 32x32 versions