Replaced contenttypes with icons on history page

And in doing this, I found a bug in my grouping code, as in case of renaming action, the comment of latest revision is somehow getting forwarded to the earlier revision, So in the mean time i will try to fix it.

mimeIcons.png

MoinMoin: AkashSinha/Gsoc2011Diary/2011-06-26 (last edited 2011-06-28 15:55:10 by AkashSinha)