core: add sourceURL to css resource content
core: add sourceURL to css resource content

smelukov/basisjs,istrel/basisjs,tyanas/basisjs,tyanas/basisjs,istrel/basisjs,fateevv/basisjs,tyanas/basisjs,smelukov/basisjs,basisjs/basisjs,fateevv/basisjs,basisjs/basisjs,smelukov/basisjs,basisjs/basisjs,fateevv/basisjs,istrel/basisjs