extension priority configuration

[seebi]

• currently, the extension config is ordered as loaded from the directory iterator (from z to a)
• we need config option which allows extensions to say "he, I'm important and want to be executed before other extensions"
• this affects the running order when an event is triggered (e.g. linkeddataserver needs to be executed before site extension)

This should be implemented in the OntoWiki Extension Manager application/classes/OntoWiki/Extension/Manager.php

[jbrekle]

+1

when touching this, one could also tackle the underlying problem: extension dependencies. the order can be inferred from the dependency graph. it can also contain a node for the ow application, which has dependencies to the core extensions (account, etc.).