0.12.2

Some minor cosmetic fixes in the examples and the purr-data interface.

To get around some performance issues with the animations (hello-gui.pd_lua and osci3d~.pd_lua) on lesser machines (and also with Purr Data where high-frequency gui updates are slow on newer nw.js versions), I also added an R variable in those scripts to dial down the frame rate as needed. I've set the default R to 3, but you can set it to 1 to run the animations at their nominal speed, or increase the value as needed so that the animations will run smoothly on your system and Pd flavor. This is really a stop-gap until we figure out a way to optimize the rendering at higher frame rates.