Change AMsoil to geni-soil.
Change AMsoil to geni-soil.

Update locations and instructions to reflect the move from an internal
AMSoil repository to a GitHub geni-soil repository.

tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal