Some changes in AliL3Hough::Evaluate. Comments have been added in the code.

Some changes in AliL3Hough::Evaluate. Comments have been added in the code.
Added some timing outputs in AliL3Hough.
In AliL3HoughEval::LookInsideRoad; removed the check whether the tracks is
leaving the slice; because this fails when the tracks is bending _in_ to the
slice. In the argument, one can also access the number of padrows which where
good; meaning padrows along the road which had signal.
In AliL3HoughMaxFinder; currently the check for the gradient is commented out.