Finish up adding fields to the api docs
Staging message admin buildpack list is ordered by priority
Exclude the buildpacks which haven't been uploaded yet from the staging message

* Added an integration spec which tests the entire flow for app stage for CC with buildpacks
* Changed how UploadHandler works
Futher fixes to the api docs
Correct the output when downloading a droplet or buildpack cache
The bootstrap CSS should loaded with no scheme so that it works on http and https.