Reviewed-by: Alessandro Portale

Makes development easier (no recompiling needed when tweaking the
templates). Also, all other templates are in that folder.

Switchen from QMAKE_BUNDLE_DATA to QMAKE_EXTRA_TARGETS, like we
already do on Windows and Linux.
QMAKE_BUNDLE_DATA does not seem to create make targets. We need
to copy-if-changed the files into the resources folder on each run.

Also pushed the Resources/ folder one level deeper, into Contents/.

And also prevent a 0-size if the Qml document does not specify
width/height.

Using the QMAKE_BUNDLE_DATA variable to copy the data into
the Resource directory in the application bundle.

Short: Create a new self running qml .sis/.deb package.

Long:
A typical Qml application usually consists of a couple of .qml,
.js and image files. Deploying such an application is challenging,
especially to mobile devices.

This wizard will generate a C++ project with a customized, light
weight Declarative Viewer, a helloworld Qml file and a .pro file
that takes care of the deployment of the Qml file(s).

This is just the first step. There will be an import wizard,
and further more there will be the possibility to add additional
Qml modules and probably also Qml directories to the package.

Task-number: QTCREATORBUG-1813