v15.2.0

This pre-release contains changes to the use of the GDAL and PROJ libraries such that they are only loaded when GeoDMS actually uses any of their functions, aka delayed loading. This enables python users that had already loaded modules that linked to a different version of GDAL or PROJ, such as in GLOBIO, to use GeoDMS anyway.

Furthermore, GUI tweaks: #719, #733, #688

Fixed are: #731, #655, #710, #675, #110, #737

Full Changelog: v15.1.0...v15.2.0