Reseed implementation v1, http only

[meeh420]

Reseeding v1, http only
Added reseed hosts
Ignoring zip files for now

[orignal]

boost::asio::ip::tcp::iostream doesn't have expires_from_now in 1.46 yet.
Also I guess we might want to run reseeder in a separate thread, once it's finished, this thread will die automatically. It;s called in Load method that's called from main(), it means main thera get stuck on it. Later on it's supposed to be demonized, somain thread will not exist anymore.