This commit closes#1. I always hated that Hulu would freak out when I generated a new hosts file. It checks to make sure that it can access its ad servers before it will start streaming. I'm assuming people have other sites similar to this, so the script now can be extended with common and custom domains to exclude.
updateHostsFile.py can handle either simply combining local hosts files you have checked in, or it can
go out to the Internet to update your source files. It also handles automatically generating a header
and removing duplicates from the list.
