Cytometer.v2.0 for initial review.  Defines complete cytometer type,
including basic properties, primary optics (lasers, detectors, filters),
and dimension groups (defining dimension type and transform)
Add ID attribute to Reagent_Type
minor Fluorish schema updates
 - Add product count to target
 - Add alternate names list to fluorochrome
 
 Add example fluorish element definition schema, and skeleton
implementation