fixes #282 - function-exists missing support for userFunctions
fixes #282 - function-exists missing support for userFunctions

dleffler/scssphp,dleffler/scssphp,webdevid/scssphp,webdevid/scssphp,kkkyyy03/scssphp,leafo/scssphp,webdevid/scssphp,leafo/scssphp,dleffler/scssphp,g105b/scssphp,g105b/scssphp,g105b/scssphp,leafo/scssphp