-removed unnecessary "reverse" argument to 4op 1/2t correlators -standardized doc strings -removed unnecessary code for mcsolvers - possibly impement in future -added error for negative taulist values -cleanup up a few sections
-removed unnecessary "reverse" argument to 4op 1/2t correlators
-standardized doc strings
-removed unnecessary code for mcsolvers - possibly impement in future
-added error for negative taulist values
-cleanup up a few sections

zasdfgbnm/qutip,anubhavvardhan/qutip,qutip/qutip,cgranade/qutip,cgranade/qutip,zasdfgbnm/qutip,qutip/qutip,anubhavvardhan/qutip