QtQuick.Dialogs: deploy qml files only for debug builds

QML_FILES are installed with the qml plugin they belong to.  This is
helpful for debugging, but redundant because the same QML is also
packaged as resources (after 8780af05b1bc63aa71c3a318972465ffdb830070).

Task-number: QTBUG-31565
Change-Id: I0b277b62b48e0a742f3ef2ff6ee2a81cc071295e
Reviewed-by: Caroline Chao <caroline.chao@digia.com>
Increased precision in shader example

On BB10 the shader effect displayed as a black rectangle.

Change-Id: I9cd12e66875c07cc7ecfa2aec6d7e5912926511e
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>