* Move all Windows install subfolders from ${CMAKE_INSTALL_PREFIX}/share/ to
${CMAKE_INSTALL_PREFIX}/share/kicad/.
* Remove unused define DEFAULT_FP_LIB_PATH from build configuration.
* Remove Boost target when skipping internal Boost build.
* Update INSTALL.txt to reflect install tree changes.
Remove KICAD_GOST option because it is now useless: the 2 GOST options are now selectable at run time and are:
* specific page layouts (now user definable, and the GOST page layouts are available in template folder)
* notation for multiple parts per package (made in eeschema, preference menu)
* Eeschema can generate this netlist format.
* Pcbnew can use (automatic identification) the current format or the new format.
* Cvpcb does not use yet the new format.