Enable to checkout different modules with different release tags

For the moment, the CVS plugin only support the checkout of several modules, and seperatly the checkout of one modules by release / branch tag.

It would be very nice to update the plugin in order to be able to checkout different modules with different release tags.

A possible way to do that: parse the field 'Branch' and assign each release tag found to each module found. Matching errors have to be handled, for example if there are too many branch / release tags compared with the module list.