Segment download improvement

Two more features would be very useful:
1. XoloX should save window position, size etc. across launches
2. Segment downloading should be impelemented the way GetRight does: GetRight creates one huge file and separate threads write data to this file but at different positions thus you don't need more drive space than the file size of what you are downloading. XoloX saves segments to separate files and needs extra disk space to merge them when downloading is finished.