permission-errors

__permission errors solution added 522acd03386b68a471193407d0924321a323c816__
Sometimes when you install a npm package with sudo, the ~/tmp dir will have the owner `root`. This is the reason when installing/updating docpad or any other npm package that uses temporary files, results in permission errors.

__alter system files removed a59abda9975aacc9437e1c23327b71f666cca2eb__
I think it's rather dangerous to change the user of system files and make them writable.