init commit

test/parse/multiple_functions.golden

@@ -0,0 +1,13 @@
+(program	
+ (fun foo -> int
+  [] 
+  (return 5))
+
+ (fun bar -> float
+  [] 
+  (return (* 1235 500)))
+
+ (fun vertex vs_main
+  [] 
+  (:= x int (foo)) 
+  (:= y float (bar))))