Add new built-in function type() that returns the name of the type of

the given value as a string. Includes test case.

src/main/java/lua/value/LValue.java

@@ -137,4 +137,6 @@ public class LValue {
 		luaUnsupportedOperation();
 	}
 
+	/** Valid for all types: return the type of this value as an LString */
+	public abstract LString luaGetType();
 }