Merge pull request rdio#114 from jimfleming/v0.4.0-PR

Updating changelog and release version

- Adding support for `UnaryExpression`

- Fixing bug where rewrite types were not being set properly

- Fixed bug when searching for expressions within BlockStatement or P…

…rogram body

- Added JSON support

- Added CONTRIBUTING

- Added tests
- Added Gruntfile for development
- Added CI support
- Added style guide
- Added default formatting config
- Exposed getConfig api method for loading jsfmt config
- Exposed format(js[, options]) api method for formatting
- Added --validate option and exposed validate api method
- Pinned dependencies

Bumping package version

Bumping version

Bumping version; no longer jumping to parent in search results

Bumping version

Bumping npm version for more api changes

Bumping version