Run hooks
Allow configuration of hook directory
pass environment variables, not command-line args, to hooks
Move hooks runner into pods pkg
pod: Extract configFileName function
pod: pass PodManifest, not just ID, to RunHooks
RunHooks: pass file name, not dir, in CONFIG_PATH
Merge pull request #22 from square/ptseng/hooks

Run hooks
Fix errors in p2-bin2pod, add config option
Use correct runit errors
Document pod.Launch()
Only halt vagrant VM on success
Ensure that each test reinstalls the preparer
pass manifests to install, launch
Use ID() getter for manifests
Check for nil current manifests
Add preparer tests
use hooks