[TYPO3-core] RFC #11105: Feature: Add a method to register an Extbase plugin

[Jochen Rau]

Hi Steffen,

> What do you think with the constant, so we could use it in localconf like
> if (EXTBASE_LOADED) {...}
> ?

I set the flag 'priority' => 'top' in ext_emconf.php. This ensures that 
  Extbase is loaded prior to other extensions.

Regards
Jochen