NuGet

I've forked and a nuget branch with the goal of getting this Log4Net Appender on NuGet. There's still stuff left to be done, but I'd just wanted to notify you of what I'm doing so you can choose to join in on the fun or not. :) I'm not really expecting you to merge this pull request, but if you want to, go ahead. Just beware that I've done a lot of renaming to make the appender easier to program against and more importantly; easier to find on NuGet.