Update to V3.4.1: downloadversionIRdata: improved documentation, adding of request for all ports, change of request paths, files; improved warning handling with repect to issue #14 (closed), adding of a first caching option changelog: updated to V3.4.1 setup.py: updated requierements to w7xarchive instead of archivedb plot_heatflux_example: added calling of the heatflux download to agree with the code. IR_image_tools: documentation update