Perf: Implement flag driven update dependency graph

[frank-weindel]

Updates to cached calculated data within a CoreNode is now updated according to the above dependency graph.

New optimizations:

• Positioning, sizing and scaling properties now set an updateType (formerly recalculationType) flag to indicate an update is needed to their corresponding matrix.
• Children are not visited unless their updateType is flagged with Children
• Any updates to a CoreNode efficiently flags all ancestors up to the root with Children
• Children are not visited if their own updateType is 0.
• World Alpha is now update cached.
• Premultiplied Alpha-merged colors are now update cached.
• Calculated Z-Index is now update cached.

Other changes:

• TypeDocs output folder renamed from docs to typedocs.
• New docs folder checked in containing manually written documentation.
• Added documentation about the Node Dependency Graph

On a RPI test, this took a resolution=1080, multiplier=1, overlay=false stress test from about 40-41 fps to 42 fps.

[frank-weindel]

There's a bug with alpha I need to look into it seems