1. Correct inheritance of GetEntryList in AliXMLCollection + bug fix. 2. Extension...

1. Correct inheritance of GetEntryList in AliXMLCollection + bug fix. 2. Extension of the collection:// URI, which now can handle also entry lists. The two available formats are: a) xml collection file with event-lists (produced by the tag analysis framework); b) TEntryList stored in a root file (TEntryList object should follow the defintion of an entry-list for a TChain). The formats are distiguished by the filename extension - .xml ot .root