Add implicit LString to number coercions.

src/test/java/lua/LuaJTest.java

@@ -51,6 +51,10 @@ public class LuaJTest extends TestCase {
 		runTest( "boolean" );
 	}
 	
+	public void testCoercions() throws IOException, InterruptedException {
+		runTest( "coercions" );
+	}
+	
 	public void testCompare() throws IOException, InterruptedException {
 		runTest( "compare" );
 	}

src/test/res/coercions.lua

@@ -0,0 +1,5 @@
+print("5.0"+3.1)
+print(4+"7.5")
+print(3.14*"  2.75")
+print("-33"/"11")
+print(-"-5")