Add toString method to alias.

Change-Id: I908939518795c48ded0b110abf69434823a285a1
Reviewed-on: http://gerrit.dmdirc.com/3537
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/commandparser/aliases/Alias.java

@@ -92,4 +92,14 @@ public class Alias implements CommandInfo {
         return Objects.hashCode(name, minArguments, substitution, type);
     }
 
+    @Override
+    public String toString() {
+        return Objects.toStringHelper(this)
+                .add("name", name)
+                .add("minargs", minArguments)
+                .add("substitution", substitution)
+                .add("type", type)
+                .toString();
+    }
+
 }