include better error output when a sphinx rebuild fails
silly typo
add good error messages for building a copied course and a custom course
require the user to be an instructor of the enrolled course before they can rebuild, change start date, list assignments, etc. Fixes #242.
Silly absolute path in conf.py modules configuration.
Merge branch 'master' of github.com:bnmnetp/runestone
Merge pull request #267 from isaacdontjelindell/sphinx-error-messages

Better Sphinx-build error output
Merge pull request #268 from isaacdontjelindell/verify-instructor-status

require the user to be an instructor of the enrolled course before they ...
remove devcourse from the all books task