Add encrypted authentication details
Use TEST_ENV_NUMBER to set Rails port
Properly return TEST_ENV_NUMBER

Test_env_number is based on the current process number, which is based on the index of the group in the group list... Which isn't going to work so well for multiple identical groups.

Extended the broker to provide correct group numbering, made the Rails server start on various ports based off this.
Stop RSpec from trying to run the Rake command as a spec
Only start Rails before the entire suite, when inside a || test.
Merge branch 'master' of github.com:sauce-labs/sauce_ruby