Fixes and & or to eval any symbols given to them

interpreter.go

@@ -54,7 +54,7 @@ func eval(exp expression, en *env) (value expression) {
 						break OuterAnd
 					}
 				default:
-					value = item
+					value = eval(item, en)
 					if !AnythingToBool(value).(bool) {
 						break OuterAnd
 					}
@@ -73,7 +73,7 @@ func eval(exp expression, en *env) (value expression) {
 						break OuterOr
 					}
 				default:
-					value = item
+					value = eval(item, en)
 					if AnythingToBool(value).(bool) {
 						break OuterOr
 					}