Use PHPMyAdmin 4.1.12 on initial provision

To upgrade from previous versions, delete the current directory.
Update README and CHANGELOG to reflect phpMyAdmin update
Merge pull request #326 from Varying-Vagrant-Vagrants/update/phpmyadmin

[PR] Update phpMyAdmin to 4.1.12 in initial provisioning
Merge branch 'master' into database

Merges changes to phpMyAdmin instalation