little temporary fix for Processing 2.0b9

In controlFrame_template.pde added removeCache(canvas) before sending
the PGraphics to the server and displaying it, as suggested in the
discussion here:
https://github.com/processing/processing/issues/1786#issuecomment-181239
26
ittle temporary fix for Processing 2.0b9

In controlFrame_template.pde added removeCache(canvas) before sending
the PGraphics to the server and displaying it, as suggested in the
discussion here:
https://github.com/processing/processing/issues/1786#issuecomment-181239
26