Proxy now working, can be given as a command line option
Merge branch 'master' of github.com:jgomezdans/get_modis
Solves #1. The program now downloads the time listing and crosses it with the requested dates, only choosing the present dates that have been asked. This reduces the number of server hits and is thus faster. It seems to work in our system. We could improve on this by also checking what dates we have in the download dir by looking at the HDF filename, but its a bit far fetched already ;-D