Split msdanalyzer class in several M files.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Merge branch 'rework'

Conflicts:
	jy/classes/msdanalyzer.m

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>