Update / initialize submodules as necessary
Only add a line to user.list if it is not already there.
Merge pull request #7 from larsbutler/master

Added some trivial tweaks to packaging/ci slides
Adding the slides for the package manager and the community sessions
Fix logic error with add-line-if-not-exists
whitespace cleanup
whitespace cleanup
Merge pull request #8 from al-maisan/master

Adding the slides for the package manager and the community sessions