+ Modifications of the standard tracking algorithm:

+ Modifications of the standard tracking algorithm:
  - Now we use the track covariance matrix in order to parameterize
    the size of the area where new hits (raw-clusters) are searched;
  - Two extreme options now exist: either we track all possible candidates
    or we keep only the best ones at each step of the  algorithm (using
    the flag AliMUONTrackReconstructor::fgkTrackAllTracks);
+ Removed the class AliMUONSegment which has been replaced by the
  existing class AliMUONObjectPair when needed.
+ Also removed or redefined some hard-coded constants used in the
  tracking algorithms.
             (Ph. Pillot)