added spectrum_pi function.  sorry!
Merge pull request #32 from nwlambert/master

added spectrum_pi function.  sorry!
added namespacing on unresolved symbols
added a unit tests for neill' new pseudo-inverse spectrum solver
code cleanup
pep8 cleanup
rename mv_avg flag in Odeoptions to average_states because it will be used in qutip.stochastic module as well
rename mc_avg to average_states in fortran module
rename mc_avg to average_states in unit tests
optional state averaging in stochastic solvers
__str__ must return a str not print to stdout
pep8 compliance
more pep8 stuff
updated smesolve development notebook
pep8 code cleanuppermute.py
pep8 code cleanup
more pep8 cleanup
pep8 cleanups of unit tests
use debug option from qutip config file in stochastic solvers
started on docstrings for stochastic solvers