(cherry picked from commit ca8b342a)

Rename 'QML standalone application' to 'QML application'
and the 'old-style' QML applications to
'QML Viewer based applications'.

For the QML renaming:
Rubber-stamped-by: Alessandro Portale <alessandro.portale@nokia.com>

This is needed for sourve packages, but interferes with binary ones.

- Set priority to "optional", as recommended for Maemo.
- Fix rules file so it can be used for source packages.

We will now behave friendlier to projects that already have a
debian directory. Also, building a source package will be more
straightforward.

Reviewed-by: kh1

Reviewed-by: kh1

Reviewed-by: kh1

Otherwise, we couldn't sensibly use the device's gdb for debugging.

Reviewed-by: kh1

Reviewed-by: kh1

Reviewed-by: kh1

Reviewed-by: kh1

This will give an additional hint to users that they can and should
adapt the Debian template files.

Reviewed-by: kh1

Reviewed-by: kh1

Reviewed-by: kh1