Add bower support

Hi Jason,

I am using [bower](http://bower.io/) as the package manager for a project.  I am hoping that you can add official support for it so I went ahead and created the bower.json file for it.  This was my first bower package so I tried it out by registering in bower registry under `flexnav`.  You can find more info at [registering packages](https://github.com/bower/bower#registering-packages).

Once you have merged this in then we will have to request that they delete my registration and allow you to register (`bower register flexnav https://github.com/indyplanets/flexnav`).

Thanks!
Farhan