Misc changes from Myron

* Use consistent style for code snippets
* Fix typo
* Greatly expand history.

The history could use some feedback, particularly from @dchelimsky.  Is it accurate?  Did I cover the important things?

/cc @JonRowe 
Good idea.  I added the year in 4502ef95e874ed9af6da346b6c073ebd00c1a3ee although I worded it differently -- I didn't think it read well to say "taken over by David Chelimsky in 2006 who brought it into the limelight...".