Security accounts

See merge request !224

Reports overhaul

Closes #12, #47, #46, #45, #43, #44, #42, #465, #470, #468, #38, #39, #40, #33, #35, #32, #31, #15, and #11

See merge request !223

[accounts][migration/templates-email] migration to set all users properly and inform rejected users of the new supervision rule

[accounts] added all functionalities to change/add supervisor and for godfather to validate/remove supervisee

[accounts] static/templates/templatetags/views added first account information for valid user and implemented yearly revalidation functionality