* help in makefile
* fix some device tests, http_server is pending
* fix webserver test, one test is disabled due to general python2->3 failure
* remove debug strings
* minimize diff
* set reset method back to the default one on generic board
* fix vcc range check from datasheet
vcc is read as 2.9V here, datasheet says 2.5-3.6, old low limit was 3v
* tell python to decode string