stashcp looks up geoip information way too much

[DrDaveD]

stashcp looks up geoip information far too much, in two ways:

1. Even if the copy is going to come from cvmfs, it looks up the geoip information. This is even acknowledged in a comment which just says "oh well", but this is a big deal. It is putting for more load on the servers than necessary.
2. If it is copying multiple files, it re-looks up the information for every file instead of keeping track and reusing the information.

[djw8605]

#82 should fix both of these issues.