custom Xvfb init script anymore; lets try out travis notifications

Remove more ordering assumptions - this time in the ordering of aspects in the dropdown. Are we there yet?

This reverts commit dca26ee3.

Cucumber/spec cleanup. Removed some stray aspect.firsts, which should improve reliability across databases. Removed some cucumber steps we don't use & consolidated duplicate steps.

Make connecting users in cucumber more deterministic. Should cut down on spurious failures in comment spec.

Make posts.feature a little more reliable. The Scenario Outlines were sitting on the profile page as the background ran which may have been contributing to the System Exit problem.