[Add] mail views
[Upg] email activation in config
[Upg] activation mail : config & sent
[Upg] user activation view
[Upg] user activation : ok (need more tests
[Upg] add comments
[Upg] mail subject
[Upg] documentation for emails
[Fix] custom docs
Merge branch '1.1' into mails
Merge branch 'mails' of github.com:MrJuliuss/syntara into mails
[Upg] upgrade docs
[Upg] user activation default