TDD baby
Search multiple locations for the config file
Allow user to specify the --path option when running configure
Fix/Add features for configure
Document config stuff
Remove print statements
Remove @focus tags
Remove redundant comment in Berkshelf::Config
Make DEFAULT_LOCATION a class method on Berkshelf::Config
Don't assume Thor::Shell::Color

- fixes #482
Merge pull request #505 from sethvargo/476_more_configs

Accept Berkshelf configurations from other paths (#476)
Change docstring. Make test nicer
Merge pull request #507 from sethvargo/482_thor_shell

Don't assume Thor::Shell::Color