added preload nodes
added comments
added depth filter for preload
preload nodes by paths (much faster)
added stopwatch event
added removed line
minimized usage of heavy method getNode
filter routes not in language
fixed pr-comments
cleaned code
Merge branch 'feature/preload-nodes' of git://github.com/sulu-cmf/sulu into feature/preload-nodes

Conflicts:
	src/Sulu/Component/Content/Mapper/ContentMapper.php
Merge branch 'develop' into feature/preload-nodes
cleaned code
Merge branch 'feature/preload-nodes' into develop
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into develop