Problem fetcher not working

https://github.com/ccoffey/ProjectEuler/blob/master/src/EulerAssetDownloader.py#L21 tries to use two URLs that are now 404s

http://projecteuler.net/minimal=problems
http://projecteuler.net/minimal=1

The closest equivalent now is probably:
https://projecteuler.net/show=all
http://projecteuler.net/problem=1
