Adding 'testFile' to SparkFunSuite

Makes it easier to load files from teh classpath.
Updating the bdg-formats dependency to 0.3.1
[ADAM-381] Fixes Pileup usage in bdg-formats 0.3.1

Removing the usage of now-deleted fields in the new Pileup schema.
[ADAM-327] Adding Gene, Transcript and Exon models
Merge pull request #404 from tdanford/gene-models

[ADAM-327] Adding gene, transcript, and exon models.