first commit
fix propagator in mixedTripletStep
restore warning
adding missing files
adding missing files
add parabolic field for track building
switch to LogDebug
move parabolic field to standard includes
add parabolic MF
remove parabolic MF
Merged tracking-use-parabolic-mf-v2 from repository cerati
parabolic in fitting
Merged hlttracking-parabolic-mf-build-fit from repository tropiano
add MagneticField_38T_PostLS1_cff
Remove hasPredefinedHitErrors member from SeedingLayer(SetsBuilder) as unused

This simplifies further development of SeedingLayerSetsBuilder.
Remove useErrorsFromParam, hitErrorRZ, and hitErrorRPhi from configuration
Add SeedingLayerSetsHits for transient EDProduct of SeedingLayers
Add SeedingLayersEDProducer
Add TrackingRegion::hits(const SeedingLayerSetsHits::SeedingLayer&) interface

The old interface needs to be kept, because some classes use it with
ctfseeding:SeedingLayer's constructed without SeedingLayersESProducer.
I used templates in CosmicTrackingRegion and
RectangularEtaPhiTrackingRegion to avoid copy-pasting.
Migrate LayerHitMapCache to SeedingLayerSetsHits