added initial support for humidity sensor
added initial support for humidity sensor

tweaked error-recovery hack to get around garbled
llap messages

Signed-off-by: Jukka Laukkanen <3ebd27b3ebc4dc4012b9fb521dc073d3c06a6a8a@gmail.com>

jukkalau/raspiathome,jukkalau/raspiathome,jukkalau/raspiathome