Fix basic class processing via metatables. Make print output more closely match that produces by C interpreter

src/main/java/lua/value/LFunction.java

@@ -4,7 +4,7 @@ import lua.StackState;
 
 public class LFunction extends LValue {
 
-	public String toString() {
+	public String luaAsString() {
 		return "function: "+hashCode();
 	}
 

src/main/java/lua/value/LTable.java

@@ -50,10 +50,14 @@ public class LTable extends LValue {
 		state.stack[base] = val;
 	}
 	
-	public String luaAsString() {
+	public String toString() {
 		return m_hash.toString();
 	}
 	
+	public String luaAsString() {
+		return "table: "+id();
+	}
+	
 	/** Built-in opcode LEN, for Strings and Tables */
 	public LValue luaLength() {
 		return new LInteger( m_hash.size() );

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

@@ -9,6 +9,10 @@ public class LValue {
 	protected static LValue luaUnsupportedOperation() {
 		throw new java.lang.UnsupportedOperationException();
 	}
+
+	public String id() {
+		return Integer.toHexString(hashCode());
+	}
 	
 	// test if value is true
 	public boolean luaAsBoolean() {