Improve HTTP\Response test coverage
Remove unused argument and fix usage doc for Http\Request->is()
Improve HTTP\Request test coverage
Improve HTTP\RedirectResponse test coverage
Add flush test for Http\Request
Merge pull request #3408 from ebollens/tests-Illuminate_Http

Improve HTTP test coverage
Fix comments.
namespace

[ErrorException]
must be an instance of Blueprint, instance of Illuminate\Database\Schema\Blueprint given
Flash previous URL to session at the end of each request.
Increment version.
Merge pull request #3412 from Shhu/patch-1

namespace
Fixed dependencies
Use referer header if it exists.
Merge pull request #3432 from GrahamCampbell/4.1-composer

Fixed Whoops Version
Fix order of Redirect::back
Remove previous URL stuff from session. Bad idea.
Increment version.
fix code and test
Easier testing of Eloquent query SQL
Fix class based replacers.