Added broken check for bool if cond. Also added some wonky if/else pretty printing for AST.

test/simple_else_if.ink

@@ -0,0 +1,11 @@
+vertex main :: (pos : float3 @position) -> float4 @position {
+	if pos.x > 100 {
+		return float4(pos, 1.0);
+	} else if pos.x > 50 {
+		return float4(pos, 1.0);
+	} else {
+		return float4(1.0);
+	}
+	return float4(0.0);
+}
+