The goal of this issue is to officially drop support for PHP 5.3 and require PHP 5.4.

We announced this in a blog post few months ago: https://piwik.org/blog/2014/10/announcing-piwik-will-end-php-5-3-support-six-months-may-2015/

Notes

• Update requirements
• Update api.piwik.org/1.0/getLatestVersion/ to return 3.0.0 only when PHP >= 5.4.0
• Change CI build and remove PHP 5.3 builds
• maybe some part of codebase can be simplified in case we were doing custom logic for PHP 5.3