store sums of squares, and estimade the standard error
fixed bug in ss calculation
fixes #17. better default value for isherm parameter in liouvillian_fast.
Merge branch 'master' of github.com:qutip/qutip
fixed #16. evals and evecs already fliped if sort='high' (when num_large is used)
fixed error in SSE photocurrent functions
improved support for SDE with poisson increments
skip sum over projections with occur with zero frequency, since the wavefunction norm for those projections give nan
bug fix: do not discard negative dW
updated heterodyne d1 and d2 functions
added check to avoid possibility of division by zero
bugfig: resolved missing symbol
support for adding state to function callback signature
new flag in Odeoptions which indicates which type of function callback signature to use for TD problems
worked on mean-field example
work on mean-field ME example
updated notebook
add support for passing state vector hamiltonian callback functions in unitary se solver
updated mean-field ME notebook
UPDATED: Added fix for dummy threading issues

This fix is intended to be temporary