checksums

checksums is used at run time in 4 crates. It's used at build time in 1 crate.

Number of dependers	checksums version	Downloads/month
3	0.9.1	1.7K
1	0.7.1	9
1	0.5.5	46

Depender			checksums version
		avra-rs	build	^0.9
		cramino		^0.9.1
		csum		=0.9.1
		tmpshare		^0.5.5
		tarsum		^0.7.0