Add guard
Clean up specs a little
Remove guard

Again, there is value in keeping the repo simple since we'll have to
hand it off at some point. I'm using :!spring spec [%] + :focus and it
seems to be working fine.
Add CanCan, check rights to update orders

Includes some generic spec / controller cleanup as well
Clean up order controller spec
Allow "request for". #100, 97

This wires up the "place a request on behalf of ..." functionality that
PCMOs and admins need.

@jasnow - I can't run cukes on my machine because of something Headless
related ("Xvfb not found on your system (Headless::Exception)"), so I've
stubbed out the .feature file. I'm going to assign these to you to
finish up the feature testing (and to kick back my way when they're
broken). Can you also help me understand what I need to do to get the
cukes running on OSX?