Added missing dependency in bower file

[andrei-cacio]

Fixes #33

[elpic]

Can you merge this it's would be really useful. Thanks

[desandro]

Thank you for this contribution. I'd rather Outlayer adhere to the Bower spec and use main only for its entry point files.

If you're using a build tool that uses another interpretation of main, like Wiredep or grunt-bower-files, then you'll have to use their config to resolve their issues.