Beautiful new website

Using Bootstrap, the landing page got a big update to a much more clean
design that better showcases the application

-Allow sources to be added in document without adding them to the paper
-Prevent default responses for tabs while a panel is open (like fix this
change later)
-Outline Panel runs along side your document, adding bullet points and
using tab to modify the bullet's priority. (Still acts weird sometimes
though, so there may be fixes to this)
-Fixed panel ui
-Developers can now integrate things to be saved into the file and
recall them on a new session with ease
-Minor bug fixes and UI touch-ups