Added a client_version string to desired_capabilities
Added a tool list to config.
Allowed for tools to be added to the list
Fixed stack overflow when calling current_url
Added 'render' method for capybara-screenshots
MERGE!

Merge branch 'master' of github.com:sauce-labs/sauce_ruby
Merging changes from master
Added Capybara 2.1.x as a dev dependency
Added Capybara 2.1.x build for Travis
Rspec excludes tagged tests based on version ranges
Capybara 2.1.x finder support added
Proper relative path for gemspec
Include tools once only
Removed add_tool
Included tool guessing
Merge from upstream
Allowed for multi-level constant definitions (such as Test::Unit)
Corrected test for tool guesses
Merge pull request #130 from DylanLacey/master

Bug Fixes, Sauce internal support