Merge pull request #125 from ZeinEddin/master

Initial work for a complete documentation
Remove PHP 5.3.3 check (since ZF also need 5.3.23)
Config cache possible again....if daterange is not enabled!
empty option first (select filter)
translate action titles
image performance, toolbar (count entries, pages, ...)

* bugfix: cacheId length
* bugfix: row click disabled
* image performance
* toolbar: pages, count entries
Make private -> protected at TCPDF + NumberFormatter improvements
Merge pull request #126 from ZeinEddin/master

add more documentation for Columns
php-cs-fixer
php-cs-fixer
php-cs-fixer
fix test
dumping min PHP version to 5.3.23

https://github.com/zendframework/zf2/blob/master/composer.json#L33
Delete CHANGELOG.md
Merge pull request #127 from ZeinEddin/master

Add more documentation to the columns
Update coverage-checker.php
Update Paginator.php
Update PhpArray.php
Update CategoryController.php
Update CategoryController.php