Added README.md.

README.md

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+# Ansible Role: MySQL
+
+Installs MySQL server on RedHat Enterprise Linux or CentOS 6.x servers.
+
+## Requirements
+
+None.
+
+## Role Variables
+
+Available variables are listed below, along with default values (see `vars/main.yml`):
+
+    mysql_enablerepo: ""
+
+If you have enabled any additional repositories (might I suggest geerlingguy.repo-epel or geerlingguy.repo-remi), those repositories can be listed under this variable (e.g. `remi,epel`). This can be handy, as an example, if you want to install later versions of MySQL.
+
+    mysql_root_password: root
+
+The MySQL root user account password.
+
+## Dependencies
+
+None.
+
+## Example Playbook
+
+    - hosts: db-servers
+      vars_files:
+        - vars/main.yml
+      roles:
+        - { role: geerlingguy.mysql }
+
+*Inside `vars/main.yml`*:
+
+    mysql_root_password: super-secure-password
+
+## TODO
+
+  - Convert my.cnf configuration to template, and allow for configurable variables.
+
+## License
+
+MIT / BSD
+
+## Author Information
+
+This role was created in 2014 by Jeff Geerling (@geerlingguy), author of Ansible for DevOps. You can find out more about the book at http://ansiblefordevops.com/, and learn about the author at http://jeffgeerling.com/.