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/LNumber.java

@@ -5,6 +5,8 @@ import lua.Lua;
 abstract
 public class LNumber extends LValue {
 
+	public static final LString TYPE_NAME = new LString("number");
+	
 	/** Compare for equivalence by using lua op comparator */
 	public boolean equals(Object o) {
 		if ( ! ( o instanceof LValue) )
@@ -13,4 +15,8 @@ public class LNumber extends LValue {
 		return this.luaBinCmpUnknown(Lua.OP_EQ, v );
 	}
 
+	public LString luaGetType() {
+		return TYPE_NAME;
+	}
+
 }