Repl refactoring

[felixroos]

finally it's time to use the new scheduler + transpiler in the main repl and throw out Tone.js

This is probably the biggest repl update ever, as I decided to also improve the whole look and feel of the repl while refactoring its internals:

before:

after:

welcome tab:

samples tab:

console tab:

repl changes:

• general style & layout improvement
• improve code color theme
• remove line number gutter
• replace emojis with uncolored svg icons in header
• replace tidal cycles logo with strudel emoji (while I like the tidal logo, it did not look good that small. it would be cool to have a simple logo in the future)
• add zen mode (try finding how to activate it :))
• add closable footer with multiple tabs:
• welcome tab for new users, opens by default when the url does not contain a code hash
• samples tab with a list of all loaded samples (to be improved)
• console tab that listens to new logger messages + has some nice replacements
• reference tab with all in source doc (to be improved)

internal changes:

• throw out Tone.js and use new scheduler (cyclist) instead
• throw out eval package and use new transpiler instead
• improve repl function to support all features of the main repl
• add logger system
• refactor draw to work with new scheduler
• move draw logic to core
• support multiple onTrigger callbacks (useful for logging) + refactor usages
• lazy midi & osc: only tries to start web midi / connect to osc server when .midi / .osc is used
• make sure browser console does not log any unwanted warnings
• move stuff in webaudio / sampler