Merge pull request #95 from jamslater/master

Search auctions for specific card variations (e.g. IF) by definition ID
travis: remporary disable 2.6 (certificate error)
Change fifa14 in some URLs to fifa15

I'm slightly surprised this worked!
Slightly speed up login by using a more direct starting URL

The previous URL 301-redirects to this one.
Implement DelayHTTPAdapter
Temporarily disable automatic credits updating
Retry failed requests
Temporarily comment out pile size update on login