Merge pull request #10 from sergio91pt/master

Sync next
Generalise the recommended phpBB version.
Update CDN HTTPS Url. Closes #12.
Update UMIL from v1.04 to v1.0.5. Closes #9.
Update MODX from v1.2.5 to v1.2.6
Prepare to publish v0.2.3
Prepare to publish v0.2.3
Add modx schema since its refered by XML files.
Don't export modx schema.
Update version check URL.

Also update v0.2.3 changelog.
Remove author homepage pointing to the github page.

The new MODX schema supports a github tag.
Theres no need for duplicate information.