Working role for review.
Code review comments and general cleanup

removing stub code

use ssh_opts

whitespace

whitespace

whitespace

ssh_opts

whitespace

whitespace

Comments

comments.
Removing cruft
Removing more cruft
bringing in-line with other apps
Remove sudo user
Add default XQWATCHER_COURSES
Merge pull request #1115 from edx/e0d/xqwatcher

Working role for review.