Added packages for sending emails and activating accounts.
Added user profile page.
Added account activation using activator module. Need to debug.
Working on user profile activation, almost done.
Fixed some activation-specific issues. Moved email login data to file email-settings.json (ignored). Added email-settings-example.json.
Implemented change password, change email and remove account actions in user profile.
Implemented password reset feature.
Implemented restriction for accounts that are not yet activated to run and save simulations.