Refactored configuration to key on any options starting with "SAUCE_"
Merge branch 'master' of github.com:sauce-labs/sauce_ruby
Updated selenium specs to include new Sauce::Connect start
Update Cucumber integration to work with new per-file browser parallelization.

Added a Rake task to install features helper.
Added a Rake task to run features with specified files
Made sure Cucumber started Connect, quietly.
Refactored Rake task to accommodate new arguments
Refactored Rake task to accommodate new arguments