Spotify Login dialog

New systray icon
Correctly set rackmate.rc VERSIONINFO
Add manifest so we can use modern UI controls
Fix weird path creation errors
Fix continuously rebuilding rackmate.res

For some reason `windres` touches the output file so that it has the same timestamp as the rc file. Which means that if the rc file is older than the other deps, `make` will continuously rebuild rackmate.res.
Use proper system font, fixes Windows 7 appearance