merge
merge solver-api-consolidation
code cleanup and isolation of private/public functions
docstrings updates
added encoding
updated stochastic docstrings
fixed minor docstring formatting issues
more docstring updates for stochastic module
code cleanup and expanded docstrings
rename sepdpsolve to ssepdpsolve. docstring updates
docstring fixes
completed rename sepdp -> ssepdp
restore steady for increased backwards compatibility
restore old liouvillian implementation under the name liouvillian_ref and reinstate the unit test comparing reference and optimized version if liouvillian
fix identation error
Added qubits to _init_.py
Switched to tensor function in place of ket
Added method run_state() to use initial state of qubit register
Added not implemented error if state is not defined
merged and resolved conflicts