Improved control of WordPress debug

WordPress understands three constants when it comes to debug:

* WP_DEBUG - overall,
* WP_DEBUG_LOG - whether or not to write debug messages into
	wp-content/debug.log file
* WP_DEBUG_DISPLAY - whether or not to show messages on screen

Now all three defaults are set to false and there is a way to
control all three from .env .
Fixed WordPress friendly URLs
Merge pull request #16 from QoboLtd/wordpress-debug

Wordpress debug