Setup the enforcer plugin
Merge pull request #142 from bigdatagenomics/matt-maven-enforce

Enforce Maven and Java versions
Moving createSparkContext into core

- There are some specific ways that ADAM needs to setup the spark
  context, and can be used if only core is referenced
Updating Changes files
Merge pull request #148 from genomebridge/moveSparkContextCreation

Moving createSparkContext into core
Merge branch 'master' of https://github.com/bigdatagenomics/adam into vcf-work-master-merge

Conflicts:
	adam-core/src/main/scala/edu/berkeley/cs/amplab/adam/rdd/AdamContext.scala
Merge pull request #156 from nealsid/vcf-work-master-merge

Vcf work master merge