Release/topics c d g v documents update (#439)

* Update README.md

* Topic c final document for release on 19 March (#1019)

* topic d final version with adaptations based on github discussion (#1016) (#1020)

* Topic g (ZKP) updates after second fgm for release 19 March (#1018) (#1021)

* updates after second fgm (#1017) (#1022)

Author: paolo-de-rosa