Doc: Updated information about application development on Mac

Summarized the application development story and removed
some unnecessary details about the qmake options and their purpose.

Task-number: QTBUG-32192

Change-Id: Iac13961a9d8fc66c15276a552d346c5e259ecd4d
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Doc: Update QML Getting Started tutorial

This change addresses issues with the QML getting started
tutorial:
    - Fix and clean up code snippets
    - Update to discuss QML modules
    - Fix linking, language issues and typos

Change-Id: Idb8bc6be9b1dd5b302bea3eb78154553b10b66df
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Doc: Mention Qt Quick Dialogs in getting started tutorial

As the Qt Quick Getting Started tutorial implements its own
file dialog, add a note about what we currently provide in
Qt Quick Dialogs to avoid confusion.

Change-Id: I916729a7e8561c3093ca761b10b944ae47deb90b
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Doc: Enabled cross-linking to "qmake Manual".

Added "qmake" to depends variable

Change-Id: I5c472faaabaf0900629641c9cec8df47fd09df8a
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I8d801d3e4e9e1cd110786cfc23b955b21a732029