Create LICENSE.md

Merge pull request #78 from colinmollenhour/fix-rsyslogd-error

Fix error 'cannot open kernel log (/proc/kmsg): Operation not permitted.'

Merge pull request #77 from meanbee/7.3-and-7.4

Merge pull request #76 from meanbee/mysql-client-failing

Allow 7.4 to fail while we wait for IonCube

Add 7.4 images (without IonCube)

Add 7.3 images

Fix failing mysql-client package installation

Update xdebug usage instructions

Correct links to 7.2 images

Merge pull request #72 from meanbee/php-7.2

Merge pull request #71 from meanbee/upgrade-xdebug-2.6.1-php-7

Allow the test runner to detect dinghy

Add PHP 7.2 images