Add py-pyrsgis 0.2.4

PyRSGIS is a powerful module to read, manipulate and export geo-rasters. The
module is built on the GDAL library, and is very efficient for various
geospatial analysis.

WWW: https://github.com/PratyushTripathy/pyrsgis

• While I'm here, use PYNUMPY

PR: 241509
Submitted by: Rainer Hurling <rhurlin@gwdg.de>