#1 Supporting generics and initial size in constructor

[HaiXin Tie]

The current version of MultiTreeMap is from 2003, which does not support the new Java generics declaration. But since it's under LGPL license, other parties are not allowed to change it. I'd greatly appreciate it if you guys could make the change to support it. MultiTreeMap a very useful class in java collection and I think it should be included as the java standard API. Too bad it isn't. And you guys' version is the only one that I can find on the web.

Another nice to have feature is to have a new (set) of constructors with parameter specifying initial size of the map. Thanks for your consideration.