add serial port comments.
setnotification  param error
Reduction
Merge pull request #21 from mrichie/master

setNotification api 参数错误
after merge

delete some Member variable
add profiles and services comments.
Merge branch 'master' of https://github.com/bcsphere/bluetooth
add comments and docs.
upgrade to 0.5.0
callback is empty
Merge pull request #2 from bcsphere/master

merge from origin