Fix for _version and version2int in about()
Fix for _version and version2int in about()

Just come across another consequence of "_" change in version :)
qutip/qutip,cgranade/qutip,zasdfgbnm/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip,qutip/qutip,anubhavvardhan/qutip,cgranade/qutip