Updates for XML schema compliance.

Added tags for additional info in TCX file and a tries to use a
valid value for sport type/activity based on user defined meta
data.
Change animation for reveal on AllPlotWindow
Fix crash on wake from sleep

.. in WFAPI due to autorelease pool gone.
Update install instructions for Mac

.. to explain qmake basics.
Merge branch 'master' of github.com:GoldenCheetah/GoldenCheetah
Animation for AllPlot only for background
Wait before controls appear on AllPlot
Reveal experiment with Histogram
Reveal experiment, faster and in-sync.