Started new feature: load a task from GPX file
Continued work with GPX task
Finishing up with GPX tasks
Latest fix: the root node is gpx
fix Task Loading :

task options need to be read before turnpoint list for avoid error if task type loaded is notsame of previous task ...
fix : Old Task file compatibility
   old task file loading are broken by commit : 14c9a655a322867ee7f8643a1548078100dc22e4
Merge branch 'gpx' of https://github.com/alus-/LK8000 into new
Merge branch 'taskload' of https://github.com/brunotl/LK8000 into new
Merge branch 'TskCompat' of https://github.com/brunotl/LK8000 into new