Doc: add link to Scalability topic

Add the link to topics that describe UI development
with Qt Quick.

Change-Id: Ib44e61f480d6417cec230bf9122a36af4c260749
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Call new QtQuick "QtQuick 2" instead "QtQuick 2.0"

Usually you talk about 'QtQuick 2' in contrast to the Qt 4.x stack (Qt
Quick 1). 'QtQuick 2.0' is just the exact import line we supported in Qt
5.0 ... The latest import we support in Qt 5.3 is 'import QtQuick 2.3'.

Change-Id: Ibc74eed98f721da1cd7d78a575e9ab82c37bf0f9
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Bump QtQuick import to 2.3

It doesn't make sense to advocate the use of QtQuick 2.0 anymore. We
can expect that people target Qt 5.3 in the Qt 5.3 documentation ...

Change-Id: I6ac8dca59a2717fe6d8baec13d968bd74070e90e
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
BlackBerry: Added platform specific documentation

Moved some documentation from http://qt-project.org/wiki into qtdocs.

Change-Id: I42588f090ecce49d77bfc31de189d69e554786da
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Update the Qt for Embedded Linux page giving env variables preference

Environment variables are inherited by child processes, whereas command-line
options aren't. Environment variables are therefore preferable for anything
relating to how to interact with the display server.

Change-Id: I5e947065ec19bb19d41ce55310699f11cfe76d52
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
iOS: Clarify Xcode 5 requirement for developing with Qt for iOS

Change-Id: I3472fb011f9e669efe5b8b8a7b90bfb662063688
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I702087ea1a6b416da7f9011419de6a17ccfc00c3