* Add initializeGL and deinitializeGL methods to OpenSpaceModule Call releaseAll from ProgramObjectManager in deinitializeGL to guard against errors when deinitializing assets
* Change removeProgramObject function in RenderEngine to take a non-owning pointer instead of a reference to a unique pointer to make it compatible with the ProgramObjectManager
Update Ghoul repository
* Using ProgramObjectManager in more modules to reduce the number of programs compiled at startup
Merging Dashboard branch that introduces the Dashboard, DashboardItem and moves most of the screen rendering code into a component-based layout that can also be displayed as a screenspace renderable
* Add Onscreen Dashboard
* Add Dashboard class
* Add DashboardItem classes and subclasses
* Added font and fontsize customization to dashboarditems
* Add default dashboard specifications to all scenes
* Add tests.scene to test dashboard items
* Add configuration options to DashboardItemDistance
* Fix distance conversion to correctly use singular or plural values
* Make DashboardItems unique when adding them to a dashboard
* Correctly position test with different font sizes
* Add Dashboard Item that enables spacing between other items
* Add performance measurement to dashboard rendering
* Add method to DashboardItemDistance that computes distance to surface
* Add DashboardItemAngle that computes and prints the angle between three objects
* Add DashboardItemInstruments that shows the instruments on New Horizons
* Add ability to OpenSpaceModules to return a list of Luascripts defined by child objects
* Make it possible for ScreenSpaceDashboard to work with its own dashboard or the main one
