Synch changes.
Made changes to appendix-b.asciidoc
Merge branch 'master' of https://atlas-server.oreilly.com/git/1234000001642

Conflicts:
	appendix-b.asciidoc
Attempting to fix ~r.
Get rid of ~r to eliminate problems with asciidoc.
Fix bug in output of Dates.julian for 2012/2013-02-05
Merge branch 'master' of https://github.com/oreillymedia/etudes-for-elixir