cleaned & organized & start adding

1. Cleaned a few paths, make it clean
2. organized the js files, and separated the styles from popup html
3. starting to work on getting data from parse to display as a list in
the popup
(this code is not working, spent more than 12 hours, need a break)
still working on adding graffiti list
Added something but got stuck

Basically, I attempted to add a list of graffiti to the popup html. But
chrome extension disabled the functionality for inline evaluation of
scripts in HTML, which is necessary when using JS templating libraries
such as backbone.js, the one Parse used.

So I am stuck~! Help!!