PHP-PM master has now $debug

[marcj]

See php-pm/php-pm-httpkernel@4de2a1a#diff-4e4aadfdc2edbd7dfe3479c6259178eaR42

Also Stack Builder has been removed since it was never in use.

Guess we should adjust this adapter as well.

Also the bridge interface has now a new method getStaticDirectory which should return the path to the folder with the static stuff.

[andig]

HttpKernel has meanwhile been upgraded to Psr7, so this adapter needs a full overhaul.