new i2c sensor (tmp175) added

Signed-off-by: Patrick Hieber <p@trickhieber.de>
Change license to GPLv3 in order to be ethersex compliant.

Signed-off-by: Patrick Hieber <p@trickhieber.de>
license fix
tmp175 in menuconfig
Merge branch 'master' of github.com:phieber/ethersex
Merge remote-tracking branch 'phieber/master'