Return true if table is already dropped or nonexistant
Return true if table is already dropped or nonexistant

Currently QDjangoMetaModel only returns success for dropTable() when
the DROP query executes properly. This changes the behavior returning
success in the event that the table is not there (either was already
dropped, or never existed)

paradoxon82/qdjango,paradoxon82/qdjango,ericLemanissier/qdjango,paradoxon82/qdjango,ericLemanissier/qdjango,jlaine/qdjango,ericLemanissier/qdjango,jlaine/qdjango,jlaine/qdjango,ericLemanissier/qdjango,jlaine/qdjango,paradoxon82/qdjango,jlaine/qdjango,paradoxon82/qdjango,ericLemanissier/qdjango