Update smartquotes:
* use the rules of the `Imprimerie nationale` as french default
(full NBSP inside guillemets).
* do not invert “ and ’ in en-UK: expect British authors to use
u0027 APOSTROPHE for primary quotes and " for secondary quotes in the source.
Set ``--smart-quotes=alt`` (or use en-UK-x-altquot) for inversion
by `smartquotes`.
* do not call ``educate_backticks`` in the SmartQuotes transform:
backticks have a special meaning in rST.
git-svn-id: http://svn.code.sf.net/p/docutils/code/trunk@8053 929543f6-e4f2-0310-98a6-ba3bd3dd1d04