add sc_ prefix to identifer? and identifier=? functions
add sc_ prefix to identifer? and identifier=? functions

leavesbnw/picrin,omasanori/picrin,picrin-scheme/picrin,omasanori/picrin,leavesbnw/picrin,picrin-scheme/picrin,ktakashi/picrin,dcurrie/picrin,dcurrie/picrin,koba-e964/picrin,koba-e964/picrin,leavesbnw/picrin,koba-e964/picrin,ktakashi/picrin,ktakashi/picrin