Crc8

Crc8 is used at run time in 15 crates. It is a direct run-time dependency in 4 crates.

Depender (with downloads and own rev deps)			Crc8 version
1.5K	4	checksums		^0.1
310	5	easy-hasher		^0.1.1
		shtc1		^0.1.1
	2	carrier		^0.1.1