Update DAT file per updated Temoa API.
Remove buggy extension module from run.

The spelling extension to Sphinx is nice, but appears to be buggy from
platform to platform.  Let's not make building the documentation for new
developers unnecessarily difficult.
Streamline data file.

The new efficiency checking routines already identified some unintended
oversights on my part.  Go routines!
Allow non-integer lifetimes.

Fixes #21
https://github.com/hunteke/temoa/issues/21

Once it dawned on me that internal summations in the objective function
were merely geometric progressions (duh! Economics 101...), I realized
that the summation was unnecessary: it is both slower and more
restrictive than the new implementation.  The new implementation does
not require integer lifetimes.

Note however, that Temoa still assumes integer periods/vintages.