fix bug in subevent parser
replace the manual addition of PDGs to TGeoManager with values inside the TDatabasePDG from root
(problem reported by Thomas Ruf)
Generalized FairRingSorter

FairRingSorter was modified in the way that it is not necessary anymore
to derive your own Sorter from FairRingSorter but you can now use it for all
FairTimeStamp data.
Get rid of the problmatic branch redesignIO
base/source need to be added to all packages using the IO manager
clean the seperation betweeen source and IO  Manager
lean the new source implementation
use the source directly to read events
Somehow I lost the changes about the dummy material in dev, I copied them again
continue cleaning the rdio
Get the event mixing runing with the new Filesource
Add test for event mixing