With the permission of my fellow contributors, I'm switching obs-studio back to GPL v2+ to prevent issues between this project and the original OBS project, and for personal reasons to avoid legal ambiguity (not political reasons, I admittedly would prefer GPL v3+)

fixes compilation with changes from e5c99175

fixes ambiguity between <wchar.h> and <cwchar>

changed gs_draw_sprite to allow custom sizes, added output textures to the core, and adjusted the test code to accommodate the changes

made a workaround to ensure that translations can be done through our custom system rather than using wx's internal system

made it so that graphics device and associated objects are not lost every time video settings are changed

added initial config file stuff, set up a 'dummy' window to cause the graphics system to persist through window changes

cleaned up main internal data structure design, changed to reference counting for sources to ensure safe destruction of source objects from all parts of the system, added some service-related stuff for testing