min time for splash screen. simulator connection progress indicator behavior corrected

BUG: goto HUD after connecting simulator does not change title and returns to simulator when rotating device.
SOL: create NavigationDrawer public method to select, call other methods to set title.
SOL: handle reinitialization of activity after configuration changes.

Orekit data loaded with DirectoryCrawler TESTED. Performances improved, still not enough (aprox 3Hz max)

Installer of orekit data implemented. Splash screen implemented to show while loading app and installing the first time.