colorhug: Rename 'ColorHug Spectro' to 'ColorHug+' for trademark reasons
colorhug: Remove the sensor type for the ColorHug+ hardware

The device only needs one (optional) sensor.

This reverts commits 0dcef3ee685524518e8769f4114319c36ea09e41 and
1fa9cf912c7aa047ad23bb0ff682419ff723095d
Release colord 1.1.6