Clean up exposed interface

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Remove original interface and implementations

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Rename http2 transport to spdy

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Update new interface naming to naming of original interface

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Update msgpack library to use fork with fix for interfaces and pointers

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Reduce transport interface and expose underlying spdy transport

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Remove pipe implementation from exposed interface

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Add ByteStreamWrapper to transparently copying ReadWriteClosers

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)