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Joe Kutner (27):
      Added support for a custom settings.xml.
      improved settings.xml usage to include env vars for path and url locations
      removed a tar flag that was only needed for testing
      added a fallback to unset MAVEN_SETTINGS_OPT if none of the settings.xml conditions are met. also added a test
      change a ! -z to a -n for clarity
      added hatchet files
      renamed repo url
      added a script to use for publishing new versions of the buildpack
      added a script to make running tests in docker easier
      added a command to remove all but bin dir before publishing
      Merge branch 'hatchet'
      moved the hatchet repos dir
      added a travis config
      added travis badge to readme
      added pom.xml with hatchet execution
      tweaking the travis config. probably got it wrong
      tweaking travis again
      adjusting rubygems dep versions
      added heroku api key to travis
      adjusting rubygems dep versions
      adjusting rubygems dep versions
      adding hatcheting setup for travis
      move some scripts under etc [skip ci]
      added more test apps, and improve tests to cover all java versions
      changed maven verion in output to be accurate
      updated hatchet tests to reflect new maven version
      updated testrunner tests to reflect new maven version