more support for the BEP-0010 extension protocol
ext_ut_metadata: BEP-0009 implementation
ext_ut_metadata: rm debug
ext_ut_metadata: data() accepts totalSize
store peerPieces as BitField

should use much less memory
per-wire bandwidth with speedometer
Improve readme
use bitfield from npm
drop node 0.8 support
style fixes
clean up api
readme
remove ut_metadata from this repo

will republish as an independent module
1.0.0