Adding Packrat atlas packer

This is a very rough/early version of Packrat, a simple texture atlas
packer.
RXPerformanceTester for testing performance
PixelSnap shader
Preliminary MeshNode system

A *MUCH* easier way to create "custom" nodes with dynamic structures.
This is still considered alpha and is very subject to change.
Metadata changes
More metadata changes
RXUtils: PrettifyJson
Minor tweaks and additions to RXUtils
Adding GetSubPercent to RXUtils

This simple function is very useful for a number of uses
Adding simplified easing equations to RXUtils
Adding some handy RXExtensions for tweens and other things
Yes, even more metadata
Tweaking the shader code to potentially be more efficient
Brand new, much improved touchmanager
Allow access to the FSoundManager's AudioSource

Now you can do stuff like pitch shifting all the sounds at once.
Tweaking FFont code

There's now a method that lets you get an FAtlasElement of a character in a font, which might be useful if you want to do some text effects or lay out the text characters in a certain way.
FLabel SignalTextChange
Full Atlas Elements

Now when an atlas is loaded, it will automatically create a element (with the name of the atlas) that refers to the entire atlas. This is useful if you want to do your own atlas parsing or other tricks.