Merge branch 'hotfix/1.0.2'
Updated Magento images

- Use official images for PHP 5.4 and 5.5
- Mimic official image for PHP 5.3
Better official images for PHP >= 5.4
Update README.md
- Added missing mbstring
- Replaced mysql with pdo_mysql
- Enable apache rewrite
Merge branch 'master' into develop
Removed now unused images
Merge branch 'master' into develop
CakePHP 2.x/PHP5.5/Apache2.4 image

And docs. Everyone like docs
wip