Discovery API: Added description of how discovery parameters can be optionally extend the Feature URI when used in the serviceType parameter in findServices(). The purpose is to create a flexble "REST-style" way of refining the search for services.

Sensor, contacts, Actuators, Context, AppLauncher, MediaContent, Messaging, NFC, Payment, Vehicle, Widget: Feature URIs updated.

widlprocxmltohtml.xsl: Introduction text to Feature section updated to describe the option with query parameters.
Merge pull request #6 from ClaesNilsson/master

Updates to support parameters for discovery