Fix Throbber

[pwnetrationguru]

This PR makes our throbber animated, using CSS3 and FontAwesome. We had a throbber of sorts for when ScanJS was running, but I've also added a throbber for when we are uploading files.

Things to note:

• Addition of FoneAwesome library
• the Throbber for file Input doesn't work exactly correctly because of the optimized fashion the JS is running in. Basically, when we grab all the files and reads them, the JS engine goes ahead and executes the other statements it knows it can, which includes hiding our throbber. :) I will file an issue for this, and update the comment here, but I think it will involve pulling file upload into a worker or something like that.

[mozfreddyb]

I don't like that we have to include a library just to get an animated throbber :( Can't we rather figure out how to make GIFs work instead instead of going down the road of adding a library for every problem we can't fix properly?

[pwnetrationguru]

This is the correct solution the problem, besides the fact FontAwesome gives us access to a lot of other things we can use in the future.

I asked about adding a GIF, and nobody wanted to do it. So instead, I fixed the problem correctly. BTW, I tried a GIF and it looked like crap.

[pwnetrationguru]

fwiw, FontAwesome will give us access to all of these icons: http://fortawesome.github.io/Font-Awesome/icons/

[pwnetrationguru]

All that being said, I do agree that we shouldn't just add libraries to solve problems we could easily solve in a different fashion :smile:

[pauljt]

I'm not thrilled about adding a library either, but it works, looks nice and the code looks fine to me. So I am merging so we can focus on more important issues.