Do a better job of recovering from bad fonts.
Improve prototypes in FramesLibrary::*.
Fix font loading on UE4 (sort of? may not be complete)
Change Frame::PinSet*Vector to *Proportional, which is a little clearer.
Fix UE4 renderer bug when dealing with text.
Add text to default UE4 test suite.
Fix optimization in UE4 renderer.
Proper integration of UE4 Frames wrappers.
Further improvements to bad-font handling.
Fix issues with trying to "render" text that does not include any actual text.