rev hatchet to fix parallel app delete problem
Merge pull request #291 from heroku/rev-hatchet

rev hatchet to fix parallel app delete problem
need to clear the destination bundle store

for instance in minitest:
-r--r--r-- 1 hone hone  2003 Jul 25 16:33 Rakefile

Don't have write permission, so the buildpack pukes when trying to
overwrite the cache.
don't load the cache if we just converted the stack

the cache will already be loaded
Merge pull request #293 from hone/debug-cedar-14

fix cedar-14 bundler cache bugs
update changelog
bump to v123
use the vendored java not the stack image one
Merge pull request #294 from heroku/jruby-cedar-14

use the vendored java not the stack image one
extract individual files from the fetcher
install node 0.10.29 for cedar-14
extract logic into NodeInstaller class, add cedar support back
move fetchers into NodeInstaller class, node-0.4.7.tgz is cedar specific