* Move install to php53 branch if running an unsupport version of PHP
* Update validate
* Move PHP version check after update check. This will prevent us from moving no update users to the php53 branch.
Hopefully if daily.php -f update fails it returns a non-zero and we can move them to the php53 branch still.
* Wiggle things around more.
* Also, send release installs to the php53 branch.
* Set notification error for old PHP version.
