Colour maps : general formatting and small bug fixing (check...

Colour maps : general formatting and small bug fixing (check size(r_vectors,2), saving cmap in 6_rendering folder, get proper cryst(phaseid) info

Signed-off-by: Laura Nervo <laura.nervo@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@958 4c865b51-4357-4376-afb4-474e03ccb993