Updated to use fxos-mvc and fxos-camera web component.

We should make a decision today about file naming. Should all files be delimited by dashes or underscores? Let me know and I will add a linter to enforce this.

My personal preference is underscores, but I think that may just be due to selection issues on PC/Mac when using a mouse.

@mikehenrty @justindarc @DouglasSherk