ADD Improvements to the release script

Add a new mode for the Code Complete and the preparation for the next version working.
As far as I remember, dev mode is just to prepare develop again after a release (i.e. a post-relese branching step). In this sense, maybe is clearer the following writting:

"-dev: prepares the develop branch after a release has been done (i.e. after a sprint or cc run of this script)"