PHP sensors are connected to WebApp Sensors.
The Apache sensors are rename to webapp to maintain
the same name sensor.
A operation enricher are included in order to deduce values
among several sensors.

Some web.app.* sensors can not be connected to Apache Server
 webapp.reqs.bytes.received
 webapp.reqs.bytes.sent
 webapp.reqs.processingTime.max
 webapp.reqs.processingTime.max
Minor Fix
Merge pull request #9 from kiuby88/phpAppDBSupport

PHP sensors are connected to WebApp Sensors.