index.html in root directory

Can one of either @kmdurand or @brandonchinn178 just give me a quick sign off on this? Don't want to push something without not having anyone look at it.

Basically this just moves everything in the `app` folder one level up and puts everything else in an `other` folder, to address #61. Also it adds back in the build files, will open an issue to figure out how to take them out again, but they're necessary for github pages to work. After one of you guys gets a change to approve this, I'll push it to gh-pages then we should have an accessible app for Viewer v1.0.0.