Update from CVS HEAD and bugfix for calorimeter RecHit visualization

Fireworks/Core: 
add string type to proxy builder configuration

Fireworks/Calo: 
updates from CVS HEAD, bugfix in calo rec-hit scaling when multiple views of  same type are added

Fireworks/ParticleFlow:
make rec-hit collection configurable in FWPFcandidatesWithHits proxy builder

Tutorial/Test:
remainings of my tutorial