Remove txt2tags specific postproc

Remove some postproc commands that were specific to txt2tags
Update .gitignore

Remove all pelican related ignore lines.
Ignore all html files.
Exclude Makefile when uploading
Add download page

Add a page with all the iso images available for download. It's better
if the downloads are not in the wiki.
Mention the repos in the downloads page
Clean up comments
Edit author name in config.t2t
Remove more leftover configurations from txt2tags
Fix weird sentence
Change rsync options
Fix heading in ratpoison section
Fix heading in KDE section
Add LICENSE file
Merge pull request #3 from gapan/master

Add a downloads page