changing version and author in sphinx (#489)
changing version and author in sphinx (#489)

* changing version and author in sphinx

* adding Econ-ARK team to copyright notice

* 2020

Co-authored-by: Mridul Seth <19121f95010eca718135f840b3a37b1e5be21e2c@gmail.com>

econ-ark/HARK,econ-ark/HARK