Bumped release date to 2013

The release date is part of the manual page
Squashed 'ocaml-re/' content from commit 26cf3ca

git-subtree-dir: ocaml-re
git-subtree-split: 26cf3ca2a97b2e5050a2569b58ba3280a9adf79f
Merge commit '53185844c6d2d9e997ac3986d467c7aa34516ecd' as 'ocaml-re'
Added: ocaml-re as subtree, ammended license