trying to support rspec 2 or 3
backwards compatibility with rspec2
more backwards compatibility with rspec2
Backporting necessary rspec3 syntax so ammeter works with rspec2
make specs inside the features compatible with rspec2 syntax
all passing with rspec 2.14 & head
able to test against different versions of rspec by setting environment var: RSPEC_VERSION

Passing against HEAD, 2.99 & 2.14
Fails on 3.0.0.beta2 (but head is > than that so might be ok for now)