Qt 5.3 introduces many new features and improvements as well as bugfixes
over the 5.2.x series. For more details, refer to the online documentation
included in this distribution. The documentation is also available online:

  http://qt-project.org/doc/qt-5.3

The Qt version 5.3 series is binary compatible with the 5.2.x series.
Applications compiled for 5.2 will continue to run with 5.3.

Some of the changes listed in this file include issue tracking numbers
corresponding to tasks in the Qt Bug Tracker:

  http://bugreports.qt-project.org/

Each of these identifiers can be entered in the bug tracker to obtain more
information about a particular change.

****************************************************************************
*                   Platform deprecation notice                            *
****************************************************************************

 - The support for deployment on OS X 10.6 (Snow Leopard) is deprecated
   in Qt 5.3, and will be removed in Qt 5.4. The platform is currently
   not tested, and most likely has issues that are not fully documented.

****************************************************************************
*                          Library                                         *
****************************************************************************

QtWidgets
---------

QtCore
------

 - Added QSignalBlocker, a RAII-style wrapper around
   QObject::blockSignals().

QtGui
-----

 - Added setSwapInterval() to QSurfaceFormat. Platforms that support
   setting the swap interval are now defaulting to the value of 1,
   meaning vsync is enabled.

QtSql
-----

 - QSqlQuery::isNull(field) now correctly returns true for "no such field".
 - QSqlQuery::isNull(fieldname) is a new overload.
 - QSQLITE: Empty database name now opens in-memory database.
 - QSqlError: Now handles alphanumeric error codes. Used by QPSQL.
              Old numeric code is deprecated.