when tagging a release, push commits to master
add jdk to the path if using JRuby
Merge pull request #220 from heroku/git_push_master

when tagging a release, push commits to master
Merge pull request #221 from heroku/jdk_path

JDK Path
update changelog
bump to v98
bump versions of heroku hatchet

Allows us to modify files of individual repos without having the changes be persisted across tests.
Test upgrading ruby versions
bump libyaml to 0.1.5 for CVE-2013-6393
hatchet now takes care of `git config`
Merge pull request #223 from heroku/schneems/version-change-test

Test upgrading Ruby versions
recompile psych if it's compiled with 0.1.4
Merge pull request #224 from heroku/libyaml

compile psych with libyaml 0.1.5
update changelog
bump to v99
update changelog
take into account buildpack v99 was a noop
bump to v100
read user ENV settings for both user-env-compile or buildpack-env-arg
quote env vars