change snp caller interface to use rods exclusively
Merge pull request #45 from hammerlab/rod-clean

Change snp caller interface to use rods exclusively
move haplotype to separate classes
Merge pull request #47 from hammerlab/move-haplotype

Move haplotype to separate classes
Fix scheme not found issue with HDFS
Merge pull request #48 from hammerlab/hdfs-fix

Fix scheme issue with HDFS
refactor kmer graph creation