Add (optional) password strength checker to user registration

[acacha]

See for example Dropbox javascript library:

https://github.com/dropbox/zxcvbn

Hi ha un exemple de component a:

http://www.vuescript.com/vue-js-password-input-component/

[acacha]

https://github.com/skegel13/vue-password

[acacha]

Optionally we can create an option to autogenerate password:

• User have an autogenerate password button
• User can see (autogenerated password only) password if he wish
• Or can generate a password and forget (it can always use password recovery to re-login)