Andrew's initial commit of modifications for SIDIS/RICH
Putting in global field handers
Added user options to scale SBS magnetic field and to turn off construction of SBS field clamps
Make so it builds
Still fixing stuff
Redesigned field interaction
Merge branch 'sidis' into g4sbsv2 - rough out new detector construction

Conflicts:
	g4sbs.cc
	include/G4SBSDetectorConstruction.hh
	include/G4SBSMessenger.hh
	src/G4SBSDetectorConstruction.cc
	src/G4SBSEventAction.cc
	src/G4SBSMessenger.cc
Builds but not debugged
Remove compiler warnings, implement BigBite field
Allow adding in generic tosca field, update examples
Geometry changes that were in before but got lost
More changes
Fixed indetation
Actually associate the field, fix some sign/rotation problems
Standardize output units
Make seed based on time, pid, /dev/urandom
Add in retrospection
Fill out retrospection
Clean up constant field code
Change beampipe to larger version from Bogdan