Very small optimalization
Impleted minor allele freq for SNPs. Needs tester
Bug fix in SNP minor allele count
Implemented generic minor allele count

Needs to be tested
Comment update
Minor comment update
Fixed testing under windows with space in path
Upgrade of the handeling of generic variant IDs

All old tests and interfaces remained intact
Also part of last commint about variants IDs
Testers for SNP genetic variant.

All SNP specific methods are being tested. Minor allele could use a few
more cases.
Merge pull request #4 from PatrickDeelen/master

Minor allele, genetic variant ID & testing