First release with custom processing core

This is first release with a patched PApplet class that essentially provides public runPropane(), wrapper so that the sketch class can call the protected method runSketch. This patch is required for jdk9 unless jruby can be patched to call the protected method of the sketch class (in the same way as you can with a java inherited class). Propane under jd8 should work as expected, but control_panel slider fails with protected access issue on jdk9, there is an issue with FX2D that requires investigation.

NB: to build this release you will need the custom processing core see https://github.com/ruby-processing/processing-core