restore use_umfpack option with a deprecation warning, not to break backwards compatibility when it is not necessary
pep8 fixes
use full module name instead of abbreviation
Use qutip.settings.debug flag instead of explicit argument verbose in steadystate module.
Removing timing functions as builtins in qutip.steadystate. Profiling and benchmarking should be done externally.
Merge pull request #98 from jrjohansson/steadystate-patches

Steadystate patches