Tank Auth SQL import files (should fix #47)

Set of 5 SQL files, use depending on your requirements:

- schema: Main tank Auth tables (utf8_bin)
- addon-RBAC: For RBAC functionality in Tank Auth (utf8_general_ci)
- complete-Tank-Auth-RBAC: A clean combination of schema + addon-RBAC for
  those who already know what they need.
- sample-RBAC: Optional sample data for RBAC tables for new users
- addon-country: Sample database of countries for the profile table (ISO)

A few notes for current TA users:
- schema.sql is the same as the original Tank Auth schema file
- addon-RBAC.sql is the same and contains only the RBAC tables from the TA fork by @enchance