Refactor cosym command line program, to separate out exporting.
Refactor cosym command line program, to separate out exporting.

Apply reindexing to the experiments and reflections, such that
the reflections and experiments from cosym_instance can be used
by other programs. The separate export step then does not need
to be called.

dials/dials,dials/dials,dials/dials,dials/dials,dials/dials