update README to refer people to jflect for other json options
update README to refer people to jflect for other json options

jmptrader/jsonq,sphereio/jsonq,davidkbainbridge/jsonq,jmoiron/jsonq,rocksolidlabs/jsonq,rocksolidlabs/jsonq,sphereio/jsonq,jmptrader/jsonq,davidkbainbridge/jsonq,jmoiron/jsonq