added support for interpolation in goto and jump

spec/vnds_spec.moon

@@ -91,6 +91,16 @@ describe "VNDS Interpreter Tests", ->
 				text run
 			')
 			assert.are.equals(ins[1].text, "run")
+		it "Label Interpolation", ->
+			i, ins = run_scr('
+				setvar RETLABEL = "hello"
+				goto $RETLABEL
+				text not run
+				label hello
+				text run
+			')
+			assert.are.equals(ins[1].text, "run")
+
 
 	--todo 
 		--nested if statements

src/script.moon

@@ -68,8 +68,11 @@ next_instruction = (s) ->
 				while count > 0
 					s.n += 1
 					count += ops[s.ins[s.n].type] or 0
-		when "goto" then s.n = s.labels[ins.label]
+		when "goto"
+			ins.label = interpolate(s, ins.label)
+			s.n = s.labels[ins.label]
 		when "jump" --see if I can reuse load here
+			if ins.label != nil then ins.label = interpolate(s, ins.label)
 			-- add string interpolation
 			ins.filename = interpolate(s, ins.filename)\gsub('{', '')\gsub('}', '')
 			s = _.extend(s, read_file(s, ins.filename))