move `ReadSuite` into `reads` pkg

mirror pkg structure of src/ code being tested
split Read.scala into more specific files

also split up ReadSuite.scala to match
Merge remote-tracking branch 'origin/adam-upgrade' into reads-pkg
import spacing via scalariform
Merge remote-tracking branch 'origin/adam-upgrade' into reads-pkg
Merge remote-tracking branch 'origin/master' into reads-pkg
Merge pull request #152 from hammerlab/reads-pkg

split Read.scala (and tests) into separate files