Updated changelog

Author: mblaschke

CHANGELOG.md

@@ -7,6 +7,10 @@ UPCOMING
 - Set Apache HTTPd and Nginx UID to EFFECTIVE_UID and EFFECTIVE_GID
 - Renamed `make deploy` to `make build` (was confusing)
 - Fixed MySQL default charset (set to utf8)
+- Added `MYSQL_USER`, `MYSQL_PASSWORD`, `MYSQL_ROOT_USER`, `MYSQL_ROOT_PASSWORD` and `MYSQL_DATABASE` for nginx/apache/php-fpm
+- Improved customization of `php.ini`
+- Improved documentation
+- Added php memcache and memcached
 
 3.3.1 - 2015-05-11
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