Update License.md
Fix the bug on the creation operator.

This will work for dimension>=2 for now. For general case, we can wait for the QuRep.jl project.
Merge pull request #2 from i2000s/master

Fix typo in `creationop`.
Use vectors to store the coefficients in QuStateVec and QuState.
Merge branch with changes of the coefficient storage.
Fix error in lindbladsuperop et al regarding the calculation of indices (rows and columns were interchanged).
Initial commit for MCWF method + some fixes for QuState.
Support for QuState as initial state in mcwfpropagate.
Rebase and adjust to new state type.
Merge changes.