In reconstruction classes:

In reconstruction classes:
- Improve track candidate selection by taking into account the resolution
  on the track parameters.
- Add a flag into RecoParam to switch between track selection on their
  slope or on their impact parameter at vertex (default).
- UPdate REcoParam in OCDB
- Take into account the chamber/cluster resolution when defining
  the "fixed" area to quickly look for new cluster to be attached to the track.
- AliMUONDigitCalibrator: Do not use digit saturation information from
  calibration file when using the calibration option NOGAIN.
(Philippe P.)