Remove submodule note and other volatile info from README

In addition to removing the stuff pertaining to downloading submodules I also removed the note about not downloading the zip. I've tested building via the snapshot myself and it works fine. Finally, I removed some information about compiling the bot so that it won't have to be changed as often in the future.
Add myself to README

This might make me seem like an ass, I know. But the more projects like this I appear in a more obvious place in the better for future endeavors. So just consider it helping poor ol' Lagg get a better career.
Merge pull request #506 from Lagg/master

Update README per NuGet migration