First pass CatmullRom Spline

Created CatmullRom Spline
Drawing and following
Updated spline class

Added rendering of curve
Updating to pass in unique name to process generator
Merge remote-tracking branch 'origin/master' into splineTest
Added calculations for tangents

Added tangent calculation
Added new math function in FVector for making a unit vector
Added drawing functions for vector
Minor cleanup/org for CatmullRom class
Refactored Spline Classes

Changed default speed to 5.0 seconds
Changed rendering routine to start very close to the start and modify
rate in order to draw a smooth curve
Removed unused function
Pulled out looping to FSplineTweener
Pulled out entity tracking to FSplineTweener
Pulled out start and end tracking to FSplineTweener
Merge remote-tracking branch 'origin/splineTest'