CoAP update
Allow a small buffer for events

I'm noticing these dropping on my small ec2 node
Parse view params with stale=false by default
Report errors in view merging
Don't report merge error nil
jsonEncode -> mustEncode

We never checked the error once, so we may as well not do it.
panic if we can't register base otto functions

If we can't put functions into otto, they can't work.
Added XXX_WITH_META opcode placeholders.
Extras during XXX_WITH_META will be > 8 bytes.
Handle XXX-WITH-META for stats & quietness.
improve view behavior when map function encounters error

correct behavior is to log the document and the error but continue to
process other documents

cbugg: bug-905
Don't need to make an error here, just log and return