Expect a text area
Implement text area
Upgrade RSpec to 2.4

This seems to fix the problems I was having with 2.0.

I'm also going to develop with Ruby 2.0 from now on, unless I see incompatibilities that are too onerous to fix.
Revert "Attempt to fix problem noted in last commit"

Problem is fixed by using RSpec ~> 2.4.0.

This reverts commit 6b834f50ba51ebae6fe4888b5b4fde4b714ec7d6.