Invoking Java Object's methods in Lua variables 

Hi there! When i store functions from any Java Objects to Lua variables, i found that when i call them, they're not called in correct order. I had fixed it by using upvalues rather than storing variables at the table. Hope you like it :+1: 
![LuaJava Issue](https://f.cloud.github.com/assets/3783077/231088/b04c0cae-86ec-11e2-9244-13534af62b94.png)