minimal additions to core docs
starting core refactor
adding documentation stubs to core
moved commit and renamed preloadFunc
moved init to p5.js and out of core
renamed init to globalInit
formatting nits
adding checking for global setup on window
changed _drawSketch to _draw, added binds for instance case, edited instance case0 sketch
checked that global setup and draw are functions
merging evelyns core updates, sketch instance case 0 now working!