Add user profiles

[musomaddie]

Allow users to create a profile.

Unique username with a password

• salt and hash the password so it's secure

User profile:

• username, skills, quests currently complete.

Can update skills and quests freely.

======================================================================== Social?? Not sure if I want to introduce a social aspect (i.e. friends, see other users profiles, compare stats)

[musomaddie]

Password salt / hashing is complete :)