New autoload and math test cases. Currently autoload does not work because

the GETGLOBAL instruction does not handle the case where a metatable method
is invoked.

src/main/java/lua/GlobalState.java

@@ -26,6 +26,10 @@ public class GlobalState {
 	private static LTable _G;
 	
 	static {
+		resetGlobals();
+	}
+	
+	static void resetGlobals() {
 		_G = new LTable();
 		_G .put( "_G", _G );
 		Builtin.addBuiltins( _G  );

src/test/java/lua/LuaJTest.java

@@ -43,6 +43,10 @@ public class LuaJTest extends TestCase {
 		runTest( "test7" );
 	}
 	
+	public void testAutoload() throws IOException, InterruptedException {
+		runTest( "autoload" );
+	}
+
 	public void testBoolean() throws IOException, InterruptedException {
 		runTest( "boolean" );
 	}
@@ -68,6 +72,10 @@ public class LuaJTest extends TestCase {
 	}
 	
 	private void runTest( String testName ) throws IOException, InterruptedException {
+		
+		// Reset the _G table just in case some test mucks with it
+		GlobalState.resetGlobals();
+		
 		// add LuaJava bindings
 		LuaJava.install();
 		

src/test/res/autoload.lua

@@ -0,0 +1,11 @@
+local function autoload(table, key)
+	local chunk = loadfile("/"..key..".luac")
+	table[key] = chunk()
+end
+
+autoload_mt = { __index = autoload }
+
+setmetatable(_G, autoload_mt)
+
+print("square root of 9.0 is ", math.sqrt(9.0))
+print("math.pi=", math.pi);

src/test/res/math.lua

@@ -0,0 +1,7 @@
+local mathClass = luajava.bindClass("java.lang.Math")
+
+local function sqrt(x)
+	return mathClass:sqrt(x)
+end
+
+return { sqrt = sqrt; pi = mathClass.PI }