Add "# coded by ..." comment to all examples:

* Also clarify copyright ownership to Sam Aaron
  or if there is a specific "# coded by comment"
  that the copyright belongs to the coder.
Add summary to use_random_seed
pull out new FX to give them more time for polish
Add new tutorial section on rings and beef up lists
Allow rings to be converted to normal arrays with to_a
update docstrings
Closing in on v2.2...
Fix typos
We're calling RingArray ring now
fix prune script
Add time machine example
move time machine from sorcerer to wizard
Update Rugged to 0.21.2 - includes libgit2 security fixes
Turn off debug for Time Machine example
changelog: Correct name of sample
clean out rugged
Add clean version of rugged 0.21.2
Further rugged cleaning
changelog: Fix titles
fix typo