PETG temperature tower test (for CURA)

Simple temp tower test.

Be sure to use the latest script when using cura > 4.*

Raw code: https://raw.githubusercontent.com/fchorney/CuraPlugins/master/post_processing_scripts/VaryTempWithHeight.py
Github Project: https://github.com/fchorney/CuraPlugins/blob/master/post_processing_scripts/VaryTempWithHeight.py

Thanks to FeNi64:
"The links for the slic3r scripts are https://www.thingiverse.com/thing:2729076 and there's a reference page at https://github.com/prusa3d/Slic3r/wiki/Slic3r-Prusa-Edition-Macro-Language. The comments for the thing point to another thing with a Cura script."