added location of vcf files
Added role to return snv_path
Remove duplicate function
Merged with wtsi-npg/devel
Added more error checking, and perlcritify
Added version string
more error checking
More tests
change copyright message
Updated MANIFEST
added snv.t
Merge pull request #130 from jenniferliddle/vcf

Vcf
Merge pull request #29 from wtsi-npg/devel

wtsi devel to my devel