update readme [ci skip]

use -s dev instead of specifying dev-master
replace aware with resolving/resolvingAny callbacks
update dependencies
override less behaviour
respect $catch
use request stack, create url generator class
dispatch kernel events
allow force starting of sessions
various cleanup
work on readme [ci skip]
fix bug on missing options config
sort imports
work on templating
add some service provider tests
templating events and some consistency
check if class exists
set version