pymata_aio v2.4 released

v2.3 removed from Pypi

The v2.3 release introduced a bug that rendered the library unusable for Windows users. Python 3.5 asyncio has a mechanism that allows registration of signals (SIGTERM, etc.), but this mechanism does not provide support for Windows. 

As a result, integrated control-c support has been removed from the library and is now the responsibility of the application developer to provide. Examples are provided for both pymata_core and pymata3 APIs here.