Add bower.json file

[Ninir]

Hi!

Just wanted to know if it could be possible to add a bower.json file, then adding ignore rules to it.

This way, it will be possible to fetch only the JS file without getting tests, HTML files, etc.

What do you think @arv?

[arv]

I don't know if it is worth doing this? Why would anyone write an app with canvas for IE8 today?

[Ninir]

Well, I had to recently. Guess it is "just in case", isn't it?

Btw, it helps managing vendors IMO.

[arv]

OK. Why don't you send me PR?