Throw an exception when no browser is set AND we're running in parallel.
Deprecate page accessor, adding a message to that effect.
Updated to parallel_tests 0.15.0
Update parallel_tests to 0.15.0
Made :browser, :version and :os ALL read from their relevant accessor, even if only one is set.

This makes Chrome work correctly.
Added simplecov for base tests
Remove gemcutter
Updated versions of rspec in test gemfiles to 2.13.  Made it float the minor.
Merge pull request #152 from DylanLacey/master

Deprecate page accessor, update dependencies, improve test outcomes.