extend CLI for sender.py. Closes #32
extend CLI for sender.py. Closes #32

cllamb0/dosenet-raspberrypi,yarocoder/dosenet-raspberrypi,bearing/dosenet-raspberrypi,cllamb0/dosenet-raspberrypi,yarocoder/dosenet-raspberrypi,bearing/dosenet-raspberrypi,tybtab/dosenet-raspberrypi,tybtab/dosenet-raspberrypi