Add Thumbs.db to ignored files
For Windows install supernova to SuperCollider folder
Add two icon-files for sclang and scide resource files
Add win-rc-files for sclang and scide and and add icons to execs

Conflicts:

	lang/CMakeLists.txt
Simplify Win-installer (remove options and comment out gedit related code)
Register installer in Add-/Remove programs and remove registration on uninstall
Associate filetypes sc scd and schelp with SC and attach cube icon
Add Startmenu item (and try to remove it on uninstall)
Brand installer, add welcome screens and use default texts where possible
Small additions to Windows Readme
Cleanup: remove unnecessary pseudo variable declarations
Cleanup: remove defunct code after consultation with author
Add QtCreator's CMakeLists.txt.user to ignored files
RelPath cleanup a: move platform specific icons to platform/windows/Resources
RelPath cleanup b: Make sc_cube.ico available to nsis install script
RelPath cleanup c: change confusing semantics of var SC_SRC_DIR
RelPath cleanup d: Adjust the NSIS script (and forgotten scide.rs) to preceding changes
Add info about installing Quarks to Readme
Enhance Quarks section in Windows readme