o) adding log tags to all files

o) adding log tags to all files
o) AliSelector: Changing the way the header is accessed: Before it was a tree friend, this results in mismatch as soon as one ESD file is corrupt. Now it is accessed similar to the method used for the kinematics tree.
o) Adding second library PWG0selectors, this is only for the build system, because selectors are compiled on-the-fly when they are used in the Process function
o) Analysis now splitted in AnalysisESDSelector and AnalysisMCSelector