update default heroku postgresql database
Merge pull request #32 from catsby/update_default_postgresql

update default heroku postgresql database
minor formatting changes for sample bash code
Merge pull request #40 from shreyasdube/patch-1

minor formatting changes for sample bash code
Remove S3Pository

S3Pository introduces race conditions in some cases. The speed benefit
of S3Pository is not apparent. This removes S3Pository, but can be
added back if a regression in build speed is introduced.
Use maven primed from maven central.
Update md5 tests with new checksum.
Merge pull request #41 from heroku/kill-s3pository

Remove S3Pository
Merged from heroku