Drop legacy DDL stuff

Support for enums and unsigned numbers was removed long time ago.
Fix access control
Add certificate data generator
Remove evil php closing tags
Add configurable fonts for embedded certificates
Merge pull request #38 from skodak/upgrade

Drop legacy DDL stuff
Merge pull request #39 from skodak/phpclosingtag

Remove evil php closing tags
Merge pull request #40 from skodak/access

Fix access control
Merge pull request #41 from skodak/generator

Add certificate data generator
Merge pull request #42 from skodak/fonts

Add configurable fonts for embedded certificates
Split lib.php and standardise file headers
Merge pull request #43 from skodak/lib

Split lib.php and standardise file headers
Replace incorrect utf8_decode
Merge pull request #44 from skodak/utf

Replace incorrect utf8_decode
Fix old upgrades
Fix multilang course names on certificates
Fix orientation field default
Fix pdf filenames and viewing, emailing and downloading
Merge pull request #46 from skodak/filenames

Filenames
Merge pull request #47 from skodak/upgrades

Upgrades