Support python 2.4, ensure files are opened and closed correctly. Don't fail if IL or pygments are missing (and not required)

[clach04]

See issues and commits.

[mattharrison]

I don't want to merge ignoring raw right now

[clach04]

I don't want to merge ignoring raw right now

mattharrison commented on a976e77 I'd rather just drop this commit

Do I need to do anything to help with this? I'm more of a mercurial user than git/github. Do you need me to revert a976e77 or can you cherry pick it out?

[mattharrison]

I will try merge your stuff later when I'm not at work :)