rework to try to fix stage_finder and color_line_finder, not all changes denoted by # ********* have been reverted; tests pass, but method is still faulty for quadrant 1 on black stage specimen.  Variants of range tests implemented for eventual convenience of testing.
Merge remote-tracking branch 'origin/master'

Conflicts:
	spec/lib/sqed/boundary_finder/color_line_finder_spec.rb