12.07.2016: First version of user-registration and login. Local (javascript) validating of unique and rule-based username-registration. Storage of password (Blowfish hash) in database.
13.07.2016: Local (javascript) validating of password-registration and email-registration. Generating new password hash for each login.
14.07.2016: Validating unique username, password and unique email with server (php) during registration, after it is first validated locally (javascript).
Working on registration confirmation through email before account is activated.
Working on possibility for a user to generate a new password if it is forgotten, based on sending a link to user's email-address.