Document development tools and how to use

[patcon]

• xhprof
• xdebug

Explain how to set up remote debugging in common IDE's.

[patcon]

Note for later, drush can be debugged with xdebug/webgrind using this:

php -d xdebug.profiler_enable=On /usr/share/php/drush/drush.php <subcommand>

A cachegrind file will be dropped in /tmp in the VM, which is where the included webgrind setup will look

[patcon]

Also, investigate collect_params: http://xdebug.org/docs/execution_trace