Image Changes to app.py

This is the start of the modularization of the code that will happen in
app.py to make the code more readable while incorporating the base64
versions of the images used in the index page.

As well, a script has been added (sprite.py) that uses an object to
concatenate images together into a single file and turn it into a base64
string. We are still deciding how to use this code and store the images
in couch.
Merge branch 'develop' of https://github.com/ruahman/swipe-technologies into develop

Conflicts:
	API/api/app.py