* converted from type() factory to proper ctypes.Structure subclasses * change class to method * bring back rtcSetLocalDescription * rename rtc_bindings.py to datachannel.py * rename rtc_library to datachannel_library and rearrange methods * cleanup
* SDP \r\n fix + build_media_description * improve tests and remove default arguments * improve tests * Refine RTC types and tests with loopback SDP validation * cleanup