Our ref devtesting is with igb now.
o Rename sin_type.h -> sin_types.h.

o Add (c) into few places.
Add missed (c) notice.
Add CALL_METHOD() macro.
Use new way to call methods to hide most of the implementation
details of the sin_wrk_thread.
Use new API of the sin_wrk_thread.
Merge branch 'master' of github.com:sippy/libsinet