message: ATO-418- adding getter for style
diff: #include "TString.h"
  class TPRegexp;
  class TStyle;
  +class TPad;
  class AliDrawStyle : public TObject{
  public:
  static void ApplyStyle(const char* styleName);
  + static const TStyle *GetStyle(const char * styleName) {return fStyleAlice[styleName];}
  static void SetDefaults();
  static TString GetLatexAlice(const char * symbol);
  static void AddLatexSymbol(const char * symbolName, const char * symbolTitle);
  