Test build pack with Hatchet

Go!!!
add rake task for running specs
only run focused tests if there are any
match instead exact fit
move anvil cleanup into hatchet
add testing docs to the README
update jdk sources
bump v59
update changelog
hatchet is now `heroku_hatchet` gem
hatchet libraries moved to "sharpstone"

Also git@github.com:#{}.git is no longer required, just org_name/name
Detect rails 4 manifest file
Add Hatchet test and Rails 4 manifest repo to sharpstone (
https://github.com/sharpstone/rails4-manifest )
un-focus rails 4 spec
fix railties spec
ignore mac specific files
Retry apps until we get a 200.

When deploying new apps there can be a slight delay between the "new app"
page going away and the actual app serving traffic.
Merge pull request #87 from dpiddy/successful-app-body

Retry apps until we get a 200.
make the vars multiline
Patch CVE-2013-1537
ignore stderr on some ruby calls where output matters