implement new addListener() method and listener signature in event dispatcher

--HG--
branch : event-dispatcher
fixed calling the listeners

--HG--
branch : event-dispatcher
use new listener signature

--HG--
branch : event-dispatcher
allow to specify service identifiers in event listeners

this allows you to write ['%myservice%', 'method'] or 'clear_%environment%_cache'

--HG--
branch : event-dispatcher
remove not only direct children, but the whole tree when an article was turned into a startarticle

--HG--
branch : 0.8
PHP 5.3 FTW
use Gaufrette instead of sly\Filesystem

--HG--
branch : filesystem
fix cache fallback name

--HG--
branch : 0.8
fixed tests and removed that stupid and constantly broken container count test
this is as good as it's gonna get in PHP 5.3 -- still, PHP 5.3 FTW!
bye bye, service-factory...
minor cleanups, mostly whitespace and simple stuff
merge with default

--HG--
branch : filesystem
do not try to load the project config when still in setup

--HG--
branch : filesystem
let's start kicking SLY_MEDIAFOLDER

--HG--
branch : filesystem
don't fail if the setup has not yet been executed and no good TZ exists

--HG--
branch : filesystem
use Gaufrette instead of sly\Filesystem

--HG--
branch : filesystem
use the correct instance, even though currently both reader and writer are the same

--HG--
branch : filesystem
fixed PHP 5.3 syntax (oh look, seems like nobody noticed this so far...)

--HG--
branch : 0.8
added missing placeholder value