FIX: Added in required PHP constant value 'CDN_OFFER_URL' which was missing from the installer config causing the installation to complete but display a notice on environments where error reporting is enabled.
Merge branch '2.2/feature/Installer_fix' of https://github.com/phillipdaviesdeveloper/pyrocms into 2.2/develop

Conflicts:
	installer/config/constants.php