added more files to ignore
add note about programmatic usage to readme
add a couple starter tests
tabs to spaces in test
add tests for case, preview, recursive, includes and excludes
Support passing in of RegExps through programmtic interface.
Merge pull request #18 from jharding/support-regex-values-for-regex

Support passing in of RegExps for regex property
option name 'path' -> 'paths'
version to v0.2.2
use minimatch package for include and exclude matching
share some option specs between search and replace