Implement #1555
Test case for #1555
Update README.md

Added CentOS build dependencies
Fix #1567
Test case for #1567
Update test case for #1498
Merge pull request #1572 from sjinks/issue-1555

Phalcon\Mvc\Router::convert()/getConverters()
Merge pull request #1573 from sjinks/patch-1

Update README.md
Merge pull request #1574 from sjinks/issue-1567

Fix segfault in post-deactivate hook