Multiple Users and Roles

[uberswe]

We need to be able to handle multiple users who can have various different roles. This will require a permission system.

• Custom roles
• Plugin defined permissions to consider in #4
• Admin users
• Single site users or users limited to a subset of sites
• Guest or public users who comment on articles in #5 for example

[uberswe]

I am moving this to Beta instead of Alpha

[uberswe]

• A roles table is needed
• Features will be hardcoded with plugins having the ability to add more features
• A user can belong to one or more roles and a user can belong to one or more sites
  • A relation table for roles and users
  • A relation table for sites and users
• Plugin CRUD functions for users, roles and sites

[uberswe]

I will look at plugin defined permissions in #38