Merge pull request #24 from michaelfung/master

make params consistent in set key
Merge pull request #26 from michaelfung/master

change date field in connection protocol
Merge pull request #27 from michaelfung/master

update ssl test report
Merge pull request #28 from michaelfung/master

update connection params description
Merge pull request #30 from michaelfung/master

fix typo in device API
Merge pull request #31 from michaelfung/master

define keepalive frame format
Merge pull request #32 from michaelfung/master

add device read/set api
Confirm default failure response
confirm Read device API
Confirm Set Device API
add various API