give Speed variable its own mongo collection
WIP: methods and reaction
kill speed upsert
kill frameidxs upset
continue shifting color widgets to last-value
option handling in ReactiveArray
clear out some old server reactive stuff
remove old 'c' var on client
nicer console logs from frame monitor
fix client frames view to scroll from most recent
console logs and tweaks
add look-behind to ReactiveArray
tweak ReactiveArray defaults
add some Array.prototype helpers
add a return bool to ColorWalks.maybeUpdateMode
more explicit request/response bounds on getFrames
arithmetic nit
add invalidation hooks to ReactiveArray
ReactiveArray newFrontIdx
add invalidation collection and handling