Guard against subsequent args being treated as file path
Add support for opening a custom url via --url option
Make url and open args exclusive
Merge pull request #36 from bclinkinbeard/url-option

Add support for opening a custom url via --url option
Merge pull request #34 from bclinkinbeard/patch-1

Enable opening of custom file
1.0.0
Merge remote-tracking branch 'upstream/master'