Fixed the alignment of the overthewire game descriptions.

[jarroldp]

Converted all the html to markdown. Removed empty lines between the outer level list items.

modified:   _posts/2015-04-23-resources.md

When built, the page should look like these:

[captainGeech42]

This makes sense. I don't know why nobody approved this in over two years, so I'll do it :)