Removed old ME classes, since the nex event mixing has been introduced and is integra...

Removed old ME classes, since the nex event mixing has been introduced and is integrated in the new AliRsnAnalysisTask object,
while ole AliRsnAnalysiSE is kept for backward compatibility (and new configs work perfectly also there).

Removed experimental classes which apply to only one resonance, since they complicate things instead of simplifying.

Removed AOD integrated cut, which are managed elsewhere. ESD integrated cuts are kept since they are used currently,
and switching to new splitted implementation will be more gradual.

All classes have been passed with astyle in order to improve code style and readability. Configuration script is
a modified version of that provided by ROOT, with the addition not to break single-line implementations (inline functions implemented in .h file)