Release 0.28

Merge branch 'master' of github.com:Nature40/Sensorboxes-Images

* 'master' of github.com:Nature40/Sensorboxes-Images:
  added snd-i2s_rpi kernel module for i2s microphones

Release 0.27

updated pysensorproxy for lighttrap

Release radiotracking-0.4.3

added pysensorproxy as submodule