Bugfix - FlyingF3: PWM6 and PWM7 used wrong AF

They bothed used AF2 which is unused for these pins
instead of AF1 so the PWM functionality wasn't
working.

Fixes #449
Attitude: no longer needs to be called revolution

This is used for all targets except CC so dropping
the prefix.
EKF: remove baro_offset tracking

The GPS wander is a lot more than the baro for the
time periods we are interested in so the simple low
pass filter currently applied isn't a good model.

In the long run trying to run some medium time scale
state estimate to track the GPS altitude bias and that
is centered around zero and a longer time scale bias
for the baro might be a better approach.
EKF: rename constants more explicitly

add "VEL_" into the variables where appropriate, before
only the POS ones were appropriate.
EKF: remove unused methods

Various explicit update type methods that are no longer
used.
EKF: disable GPS vertical position updates

The baro is more reliable, just use that.
Merge branch 'next'
qt5: update tools to install Qt5.0.0-rc2
qt5: adapt to pathname changes for some classes
qt5: drop phonon since it seems to not exist in qt5
qt5: update tools to install Qt 5.0.0 release
GCS - Port to QT5.
Notify plugin is disabled but will probably work with phonon compiled
against Qt5.
Modelview doesnt seem to work properly. Would be nice to use Qt3D
instead of glc.
Several style problems remain to be fixed. The GCS used QWindowsStyle
class which is not shipped anymore. Should be fixed using stylesheets
where possible.
QT5: Rename plugins
More Qt5 fixes.

Copying a few of the changes from Sambas.
Qt5 Win USB fixes

More changes from Sambas
Qt5: Update to the latest manhattanstyle
Qt5: More updates to the style
Qt5: More utils updates
Reenable Manhattan style
Qt5: Update to icon setting