split frontend dependencies into two packages where one will be deferred

this allows faster initial load of frontends
CallOnContentReady: remove all dependencies on ext
defer as many frontend javascript as possible
remove socialshareprivacy dependency

composer package must be added instead
make kwf utils dependencies more fine granular

avoid including ext2
build assets last as they could depend on component settings
move styles into styles file, can be easily done with modernizr js class
build: output overview about assets sizes
add required jquery plugins, remove not-working dependencies
improve deferring of js loading

with that loading starts a bit later and gives the other requests more time to finish first
also load css deferred
support adding onReady callbacks after initial calls

required because of FrontendDefer
Merge branch 'frontend-js-defer'

Conflicts:
	Kwc/Advanced/Youtube/Component.php