Revision control

++ Qt 5.1 introduces many new features and improvements as well as bugfixes
++ over the 5.0.x series. For more details, refer to the online documentation
++ included in this distribution. The documentation is also available online:
++
++
++ The Qt version 5.1 series is binary compatible with the 5.0.x series.
++ Applications compiled for 5.0 will continue to run with 5.1.
++
++ Some of the changes listed in this file include issue tracking numbers
++ corresponding to tasks in the Qt Bug Tracker:
++
++
++ Each of these identifiers can be entered in the bug tracker to obtain more
++ information about a particular change.
++
++ ****************************************************************************
++ * General *
++ ****************************************************************************
++
++ - Add a QAmbientTemperatureSensor class.
++ - Add a QAltimeter class.
++ - Add QHolsterSensor
++ - Add API for duplicate skipping
++ - Add QPressureSensor
++ - Add QSensor::isFeatureSupported()
++ - Add linux sys accelerometer reader backend
++ - Introduce QRotationReading::setFromEuler() in favor of set{X/Y/Z}()
++ - Add support for the compass sensor
++ - Add support for the pressure sensor
++ - Add support for the IR proximity sensor
++ - Add support for tilt sensor
++ - Add sensor backend for sensorfw
++ - Add freefall sensor gesture
++
++ Qt for Android
++ --------------
++
++ - Sensor implementation for Android
++
++ Qt for BlackBerry
++ -----------------
++
++ - Support QMagnetometer::returnGeoValues
++ - Prevent spurious calls to dataAvailable() when stopped
++
++ Qt for iOS
++ ----------
++
++ - Implement accelerometer for iOS
++