Summer 2019+ updates

[ffd8]

Long list of updates to master:

• softCompile! (fancy new smooth coding feature!)
• OSC integration (VJ w/ music friends and other software)
• webmidi demo (created @ p5.js contributors conference w/ support for NEA)
• audio analysis (amp) for stereo (created @ p5.js contributors conference w/ support for NEA)
• console auto hide + forward to browser console (for debugging/reporting)
• toggle linenumbers
• updated line-colors + cocoding:cursor color picker
• toggle export code with snapshot png
• recursive folder export (fixes bug)
• custom exportJSON (can export while no sketch running)
• saveHTML p5 links fixed as script tags
• added livecoding compile timer (quick/slow delay)
• catch browser crashing code bug if uneven {} braces
• updated demos (new meta sketches, 3d primitives)
• fixed minor references url hash bugs, link each ref to official doc
• cocoding: cursors
• cocoding: nickname as id bug fix (always display/login as your settings name)
• cocoding: user in room counter
• updated to ES6
• ... lots of lil stuff!