Allow App::down() callback to be configurable based on app requirement. Fixes #1701.

Signed-off-by: crynobone <crynobone@gmail.com>
Added support for view creators in addition to composers.
Update DatabaseStore.php
Update FileStore.php
Update MemcachedConnector.php
Update MemcachedStore.php
Update Section.php
Fix typo in variable.
Merge pull request #1976 from fturmel/cache-phpdocs-cleanup

Illuminate\Cache phpdocs cleanup
Merge pull request #1717 from crynobone/feature/down-callback

Allow App::down() callback to be configurable based on app requirement. Fixes #1701.
Update change log.
Added Request::format function to get a human-friendly format string for the request.
Allow array sizes to be checked by validator.
Rename getResults on relationships to get.