Absorb CustomEmitter/Affector

The signal is now on the Emitter/Affector base type, but only
emitted if connected to (to save creating the v8 object)

Change-Id: Ib5522e0f760caa17a6ad731b2dfbce9994a7664e
Reviewed-on: http://codereview.qt.nokia.com/3393


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Martin Jones <martin.jones@nokia.com>