New plugin for security replacing acegi one.
Now we use spring security.
As we change to a newer version of grails we have to do some refactors:
-json.org to json.org.simple (different behaviours)
- Now spring security plugin returns id and not user in pojo
-Some methods redefined with def and with and usual methods now are overriding and before not.

There are some changes about these things that we have to fix yet.
Fix to calendar efforts. There were not showing after grails update.
- Fix chart mood.
-Fix mail sending!
-Security config moved to CustomSecurityConfig
-Mail sending default  "to" recipient
-Security config moved to config again
-Fix registration
-Fix context authentication for users.
Oauth configuration to login with a google account. The flow is not finished yet.
Fixing googleAccount creation.
Change styles of oauth register screen
Login with google finished.
Passwords constraints fixed