Add back in allele dosage for genotypes.  It was removed in the new schema but it's still a useful metric

Also, some more changes that Avocado needs.
Merge pull request #171 from hammerlab/changes-for-avocado-to-build

Add back in allele dosage for genotypes.
[maven-release-plugin] prepare release adam-parent-0.7.0
[maven-release-plugin] prepare for next development iteration
Pair-wise genotype concordance of genotype RDDs, with CLI tool

Address review comments on Concordance pull request

Address review comments on Concordance pull request
Merge pull request #166 from hammerlab/concordance

Pair-wise genotype concordance of genotype RDDs, with CLI tool
Sign all artifacts including Javadoc and Sources
prepare for next development iteration
Remove GPG plugin since it's in Sonatype parent pom
Remove release and source plugins already in Sonatype parent pom.
[maven-release-plugin] prepare release adam-parent-0.7.2
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release adam-parent-0.7.3
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] rollback the release of adam-parent-0.7.3
[maven-release-plugin] prepare release adam-parent-0.7.3
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] rollback the release of adam-parent-0.7.3
[maven-release-plugin] prepare release adam-parent-0.7.3
[maven-release-plugin] prepare for next development iteration