Only specify column in SQLite schema grammar as NULL if defined as such.
Fixed unit tests accordingly
work on session binding.
cache found views.
check for already registered provider in load deferred providers.
revert.
Merge pull request #2352 from Aistina/4.0

Only specify column in SQLite schema grammar as NULL if defined as such.
allow facades to be mocked without application.
tweak function scope.
Merge branch '4.0' of github.com:laravel/framework into 4.0
update change log.
fix timestamp formatting on touch.
allow dynamically binding data to views.
added getConnections method. Fixes #2339.
Merge branch '4.0'