Vim's modeline support

[Tomasz Wasilczyk <twasilczyk pidgin im>]

Hi,

I recently needed indentation styles set per-file (not globally). Such
feature is supported by vim with modeline mod enabled, but my favorite
editor is mcedit. So, I've just wrote modeline support for mcedit.

Here is the patch against current git: http://pastebin.com/99anc269

This is rather a proof-of-concept, than final pull request. If you
find it useful to add its support to official mcedit, I could polish
this commit (I guess, mc_findinfile should be moved somewhere and
named differently).

By the way: how to enable BlockShiftLeft/BlockShiftRight? I tried
editing mc.keymap, but none of locations where i put it didn't worked.

Tomek