Document all the options to latex()
completed by: Tiffany
mentors: Ondřej Čertík, Aaron Meurer, Hector1618, Stefan Krastanov, Stefan Krastanov, Mateusz Paprocki, Matthew Rocklin, Ronan Lamy, Chris Smith, Joachim Durchholz
Please see http://code.google.com/p/sympy/issues/detail?id=2869 for full information on this task.
Please read https://github.com/sympy/sympy/wiki/gci-2011-landing before completing any tasks for SymPy.