Issues in micropython 1.9.4

[KTSherrod]

On ESP8266, micropython 1.9.4.

execfile doesn't work. We worked around this by modifying startup.py then importing and calling directly.

usseclient had issues importing. Header comment was removed and it imported just fine.

_thread is apparently not included and we haven't been able to find a workaround.

[Prasannakamath]

Hey @KTSherrod, I think I found a workaround for _thread error. Just create an empty _thread.py file. It is working for get and put methods, didn't try the other 2