[Blueprints] Created util.io and util.wrappers packages

[Marko Rodriguez]

Hello,

I did a big refactoring of the Blueprints packages where now there are two packages:

com.tinkerpop.blueprints.pgm.util.io
com.tinkerpop.blueprints.pgm.util.wrappers

IO: Has reader/writes like GraphML and GraphSON
Wrappers: Has graph wrappers like ReadOnlyGraph, EventGraph, and PartitionGraph.

This is a bit cleaner organization and will allow us to add wrappers more easily without "mucking" up the implementations package.

Hope it isn't too hard for you all to refactor. Also note that I have updated the other TinkerPop projects respectively.

Good luck,
Marko.

http://markorodriguez.com