Save screenshots

Not ready to merge
==============

Added campfire room posting, need to set CAMFIRE env variable with your token 

Issues:

* Needs it's own room ID.

Spec failures:

Time elapsed: 

    Then the elapsed time should be less than 1 seconds           # features/step_definitions/benchmark_steps.rb:5

Mechanize issue: 

      mechanize requires a rack application, but none was given (ArgumentError)
      ./features/step_definitions/efg_steps.rb:3:in `/^I am testing in an EFG context$/'