Add .markdown as possible extension

some PEP8-Cleanup
Merge pull request #73 from chaosblog/master

Add .markdown as possible extension
Add "autoreloader" WSGI example implementation

Use this if you don't want to restart the server process every time you
want to add a new repository.

Also moved both WSGI files into contrib/ directory as they're both more
of an example than real code.
Merge branch 'feature-layout-changes' of github.com:rcarmo/klaus into feature-layout-changes