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.

Remove callback to decrementRequestCounter in aspect-edit.js, since we don't have a request counter on that page anymore. The callback was failing, so the ajax request was never officially completing. Cucumber hates that.
I am going to add jasmine fixture generation in the controller specs, so that next time, a jasmine test will fail in this situation.
Also: clean up manages_aspects.feature.

button for adding photos works again.  pulled _aspect_nav into _header.  fixed all but one cucumber test.