Downgraded the required ruby version to just 1.9.3
Added parallel_tests and parallel to repo. Wired up a command argument for ckit brew (--parallel) to execute the wip progess concurrency method.
Added a monkey patch for parallel_tests' RSpec runner to override its defaults with ours and wired it up in the parallel execution hook. It runs but gives an argument error from ckit. Also, took a first crack at setting the base_url via config.yaml and the shared_context
Renamed parallel to parallel_tests_mods for better explicitness. Got ckit brew running with parallel_tests (WOOT!). Now just need to figure out how to execute tests within a group for each thread rather than all tests in each thread.
Test group execution working
Updated sauce brew scenario to use our sauce account
Updated comment
Wired up --processes to adjust number of processes when running --parallel, defaulting the number to 5
Merge branch 'develop' of github.com:arrgyle/chemistrykit into feature/48-concurrency

Conflicts:
	lib/chemistrykit/cli/cli.rb
	lib/chemistrykit/shared_context.rb
Merge branch 'feature/48-concurrency' into develop