camera rotation

switched camera to use lookat matrix and now it rotates at current
point, instead of center
fix out of frame hiding

All the transformation changes to use lookAts flipped all the
coordinates, missed this one initially
added infinite flow ad matrix set optimization

css setting is faster as a string, did that and made the flow loop
around
cleaned up demo code

redistribute elements and tweaked the loop. Implemented 30-element per
camera rule
cleanup and touch commands

first attempt at touch commands, but this'll get messy now to test