Add more logging to new pipeline

[servantftransperfect]

• Add a function to display histogram of matches per view
• Add a function to display statistics for sfmData (landmarks, views, valid views). Use it at each iteration and at the end of the sfmExpanding process
• Add a function to display tracks statistics. Use it at the end of trackBuilding.
• Display landmarks count and histogram of parallax angles at the end of sfmBootstrapping.