updated README
0.8.1 features

+ Added: Frame currentFramesPerSecond
+ Added: Hand stabilizedPalmPosition/timeVisible
+ Added: Pointable timeVisible
+ Added: V2 protocol and heartbeat to suppress OS controls
+ SWC/ANE is NOT updated yet
connect after adding listeners
removed missing data (unavailable as of 0.8.1+6221)

+ Fixed protocol handshake to v2
compiled windows dll

+ Updated VS project
0.8.1 new features

+ compiled windows/mac native extension
+ updated docs (https://logotype.se/leapmotion/docs)