Update POI Dependencies

[smahood]

This is more for discussion than anything, but is there any interest in updating POI to the latest version if I test and submit a PR? Current version is a couple years old at this point.

[tomfaulhaber]

Sorry, @smahood, this got lost in my onslaught of email and I didn't see it.

Sure, that sounds great to me.

Are there any particular things that we want from the latest version or are you just thinking about keeping up to date?

[smahood]

Mainly wanting to keep things up to date. I tried just plugging in the new versions and it didn't work, so I'm planning on stepping through each release and seeing if there's anything really interesting that would be worth looking at adding and will open an issue for the ones I find.

[tomfaulhaber]

One thing we need to do once we've updated is use the .getDrawingPatriarch method in place of the .createDrawingPatriarch method when we don't want to create new drawings. This will eliminate issues like #13 and just keep things generally cleaner.