Bundle guard-markdown 0.2.0
Fix zeus vs db:test:prepare problem

We could not do a db:test:prepare when zeus was running.
The zeus test_helper slave was holding a connection open to the test database.
 This was because it ran:
  ActiveRecord::Migration.check_pending!
at boot.
Moving this to a before(:suite) solved the problem.
Update README and convert it to markdown
Configure guard to convert README to HTML on changes