updated readme with info about api
updated readme with info about api

nkraft/bootswatch,nicolasmccurdy/bootswatch,nicolasmccurdy/bootswatch,iynaix/cointip_bootswatch,douglaskastle/bootswatch,douglaskastle/bootswatch,nkraft/bootswatch,douglaskastle/bootswatch,nkraft/bootswatch,nicolasmccurdy/bootswatch,iynaix/cointip_bootswatch,iynaix/cointip_bootswatch,thomaspark/bootswatch,thomaspark/bootswatch,douglaskastle/bootswatch,thomaspark/bootswatch