removal of isBoolean
	modified:   broom/builtin.go
	modified:   broom/object.go
	modified:   broom/object_test.go
Eq is replaced with reflect.DeepEqual.
	modified:   broom/object.go
removal of unused funcs.
	modified:   broom/object.go
	modified:   broom/object_test.go
removal of isProcedure
	modified:   broom/builtin.go
	modified:   broom/object.go
removal of isRecur
	modified:   broom/object.go
removal of isChar, char?
added rune?
	modified:   broom/builtin.go
	modified:   broom/object.go
	modified:   broom/object_test.go
	modified:   tests/core_test.brm
removal of isSymbol?
	modified:   broom/builtin.go
	modified:   broom/object.go
	modified:   broom/object_test.go
removal of isSymbol
updated Symbol implementaion, equal with ==
	modified:   broom/object_test.go
	modified:   broom/symbol.go
removed Eq method from Symbol.
	modified:   broom/object.go
	modified:   broom/read_test.go
	modified:   broom/sf_test.go
	modified:   broom/symbol.go