Easier installation with conda packages

[cpaulik]

Hi,

As I already mentioned in https://github.com/mapnik/mapnik/issues/3957#issuecomment-409242605 I have compiled conda packages for mapnik and python-mapnik.

Currently I've compiled the following versions for linux and python 2.7 with all optional dependencies:

• 3.0.16 of both mapnik and python-mapnik
• 3.0.20 of mapnik with 3.0.x branch of python-mapnik
• the 3.0.x branch which I've called v3.0.21a1

Installation is as easy as running

conda create -n mapnik-test -c conda-forge -c cpaulik python-mapnik

Is there any interest in this?

If so I'm happy to share my build setup and we can add it to the mapnik group or we can try to get mapnik into conda-forge.

[osuchw]

Amazingly the package works on Windows Subsystem for Linux (WSL) \o/ Thank you for your time and effort.