Allow a buildpack to be locked
Cleanup spec

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Cleanup subject / let organization

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Added Blobstore#ensure_directory_exists

[#65332674]

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Add methods to enable conditional blobstore direcectory creation.

[#65332674]

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Merge pull request #149 from knolleary/lockable_buildpacks

Allow a buildpack to be locked to prevent changes