Access to Memory (AtoM)

Related pull requests:

- AtoM code and Docker environment
- AtoM documentation
- AtoM Ansible role
- Percona Ansible role (thanks Miguel Angel!)
- Deploy pub
- AM packbuild

Thanks to David J., Miguel Angel and Mike C. for all the reviews.

Notes for testing:

• Upgrade your testing environment to use MySQL/Percona 8.0.
• If you manually create the database, use the new charset and collation:
  

  CREATE DATABASE atom CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci;
  

• If you're using old configuration files, replace utf8 for utf8mb4 in:

• config/config.php
• config/propel.ini

• Test install process.
• Test upgrading process.
• Test some utf8mb4 chars like emoticons.
• Test that everything works ;P
• Take special attention to the Function related pages.