Allowing dot-notation arrays to be used in session data. Session::put('foo.bar', 'baz');

Signed-off-by: Ben Corlett <bencorlett@me.com>
Tweaking get() method of session store so that new and old input are also retrieved using array_get.

Signed-off-by: Ben Corlett <bencorlett@me.com>
refactoring.