* [companion][build][Windows] Refactor 'install' and 'installer' targets: Use qtwindeploy to collect Qt dependencies; 'install' with WIN_DO_FULL_INSTALL=YES now really copies everything needed; Simplified NSIS script, now also supports MinGW build; Refactor libeay search.
* Rename nsis input script.
* Fix NSIS input script name in CMakeLists.txt.
* [Companion][build] Create new Windows icon with more sizes; move icon files out of src root.