Fix bug in view extending.
Blade compiler improvements

Thanks to @dyatlov and others.
use php 5.4 closures see #3687
Merge branch '4.2-compiler' of https://github.com/GrahamCampbell/framework into GrahamCampbell-4.2-compiler
Working on new Blade compiler.
Added old matcher functions.
Footer fixes.
Merge branch '4.1'
Fix section endings.