Update magecheck.php

Remove recommendation for disabling modules

Add PHP session checking

Add check for apache2handler

Add helper command for cpu cores

Merge branch 'master' into apache_modules

Refactor test results to allow for simple messages

Add check for redis extension

Create modman

Add check for memcache extension

Add required Apache modules

Fix bug in mysql check not showing current value on success and add test for table_cache

Update keep alive warning text

Update license

Update mysql checks to show config human-readable format and make file permissions check optional.