[ADAM-357] Added Java Plugin hook for ADAM.
Merge pull request #357 from fnothaft/java-plugins

[ADAM-357] Added Java Plugin hook for ADAM.
[ADAM-353] Fixing issue with SAM/BAM/VCF header attachment when running distributed.
[ADAM-351] Add simple support for symbolic alleles.
Merge pull request #354 from fnothaft/fix-distributed-legacy-output

[ADAM-353] Fixing issue with SAM/BAM/VCF header attachment when running distributed
erasure, nonexhaustive-match, deprecation warnings
Merge pull request #368 from ryan-williams/warnings

erasure, nonexhaustive-match, deprecation warnings