Make 'output' optional and fix 'matchParent' option ignoring rules with no parent

https://github.com/dbisso/grunt-split-styles/issues/5
https://github.com/dbisso/grunt-split-styles/issues/6
Signed-off-by: Paul Welsh <p.welsh@building-blocks.com>
Make 'output' optional and fix 'matchParent' option ignoring rules without parent

Signed-off-by: Paul Welsh <p.welsh@building-blocks.com>
Bump version to 0.3.0 and removed trailing commas in README.md

Signed-off-by: Paul Welsh <p.welsh@building-blocks.com>
Merge pull request #7 from spacedawwwg/master

Make 'output' optional and fix 'matchParent' option ignoring rules without parent. 

Fixes https://github.com/dbisso/grunt-split-styles/issues/5.
Fixes https://github.com/dbisso/grunt-split-styles/issues/6