[DOC] readme.

README.md

 # Gargantext Main repositories
 
+Gargantext is a Free Software, [GNU aGPLV3 and CECILL variant affero
+compliant licence for French
+translation](https://gitlab.iscpif.fr/gargantext/haskell-gargantext/blob/stable/LICENSE).
+
 Gargantext is developed by a community:
 - [Team](https://gitlab.iscpif.fr/groups/gargantext/-/group_members)
 
-First investigators:
+Its first investigators are:
 - [Architect and Project Manager](https://gitlab.iscpif.fr/anoe)
 - [Scientific advisor](https://gitlab.iscpif.fr/davidchavalarias)