ATO-78 - Technical changes to compare different calibrations

ATO-78 - Technical changes to compare different calibrations

TTree interface:
1.)  AliTPCCalPad::MakePadFromTree  : Import TTree::Draw("query") --> AliTPCCalPad
2.)  AliTPCCalPad::AddFriend(TTree * treePad, const char *friendName, const char *fname) :Export AliTPCCalPad -> TTree

Filters:
1.) Bool_t MedianFilter(Int_t deltaRow, Int_t deltaPad);   - Replace the pad calibration with median in neibrhood
2.) Bool_t LTMFilter(Int_t deltaRow, Int_t deltaPad, Float_t fraction, Int_t type) -  Replace the pad calibration with LTM statistic  in neiborhood