Much larger in-game font, makes things much more readable.

I've included Source Sans Pro Black, as it's a large readable font and I love how it looks.

Notable changes include:

* **New Energy Readout:** Much more readable and easy to figure out what's going on.
* **Colour Changing:** The energy readout will go from white to yellow to red based off of your energy levels.
* **Tile Larger Text:** You can actually read tiles from a glance now! Gasp!

Closes #16.