Merged initial Sphinx documentation structure.

There's still a long way to go in this direction, but the basic
framework is now in place.  Toss in numpydoc-style docstrings
  http://projects.scipy.org/numpy/wiki/CodingStyleGuidelines
when you have time, and things will gradually improve over time.

I also punted our user ID creation/parsing in libbe.ui.util.user to
the email module.  This way IDs are handled in an RFC-compliant way
(less suprising for users) and by someone else (less work for us :).

diff --cc doc/man/module.mk
index ea4eacc6a7be732dc859e8ac72a21f306a60fd65,0000000000000000000000000000000000000000..ea4eacc6a7be732dc859e8ac72a21f306a60fd65
mode 100644,000000..100644
--- 1/doc/src/module.mk
--- /dev/null
+++ b/doc/man/module.mk