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>