Merge pull request #236 from tzz/master

db_install fixes
Add example enable and disable wifi based on dockinstation status
This policy looks for connected docking station in lsusb output.
If the docking station is present, and wifi is enabled it disables wifi
via network manager. If the docking station is not present, and wifi is
disabled it enables wifi via network manager.
Add example policy to sketch definition
The test/example policy needs to be installed with a sketch as a
reference.
Merge pull request #242 from tzz/master

cfengine and puppet simple tutorial
Merge pull request #237 from nickanderson/examples/dockingstation_enabledisable_wifi

Add example enable and disable wifi based on dockinstation status
Merge pull request #239 from nickanderson/fix/aptrepo/missing_test_policy

Add example policy to sketch definition
Merge pull request #243 from tzz/master

Handle case where cf-sketch is a symlink to the Git checkout