Doc: added page statement in 1st section classes.qdoc

Link to Class and Function Documentation was not working
Cause: missing page statement in the section concerned.

Task-number: QTBUG-34778
Change-Id: I6a50fbb63c53ace35d405b08df92de47ee81abd2
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Doc: Updated "QML Applications" page.

-added links to Dialogs, Styles, and Layouts landing pages.
-added section about the NFC, Bluetooth, and Positioning modules.

Task-number: QTBUG-33360
Change-Id: Ia238eda34f4055ba6b2a52135f788b480512fd74
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Explain how to identify missing dependencies for Android deployment

When you deploy on Android, the tool will attempt to guess which
plugins you need. This can be confusing to many who are trying
to load e.g. images with formats that require a specific plugin
to load. So we explain in the documentation how you can debug this
and find out what modules to add to your .pro file.

Task-number: QTBUG-34586
Change-Id: Iaa13e0cc4183e3574d1b0d66a1352720c6e45753
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Doc: Discuss platform plugins in deployment documentation

The requirement to deploy the QPA platform plugin as part of
the application package was not highlighted clearly enough.
This change adds a paragraph for each of the main platforms.

Also fixes linking issue with Mac OS X deployment docs and
updates information about the macdeployqt tool.

Task-number: QTBUG-34274
Change-Id: I9554bd06aa85d4f85b6f32a574efedf424117076
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Doc: Updated the intro page

Added high-level intro text about the important features in Qt 5.x
so that the reader will get a glipmse of these features in the intro
page.

Task-number: QTBUG-33596
Change-Id: I286e6a32d1cf5e4a7e3c5f7c08e6757d7b3b592c
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Doc: Work on iOS platform notes

Change-Id: I0e70937d2ee32f2e1868da1ac0d67e9b494d17d5
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Doc: Reorganized information in smaller topics

The getting started page had grown bigger so it was necessary
to break it up into smaller chunks for easier maintenance in
the future.

Besides reorganizing existing information, added a section about
publishing to Google Play, and fixed a few language and linking
issues.

Task-number: QTBUG-33580
Change-Id: Ic84dfb171b09c394e0bde977e7909b234e82775f
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Doc: Added information about the Try Qt Enterprise page.

Task-number: QTBUG-33360
Change-Id: I2e7e3e8f9256a52ffe8f3fabe0238413cc7a3f8a
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I65967ee732dcf83df3dffae42c854965aec646fe