General enhancements

• Change: Extensive updates to config guide spreadsheet (incl Beaglebone Black)
• Add: Filled circle graphic primitive (gslc_DrawFillCircle())
• Fix: gslc_DrawLine() for vertical/horizontal optimizations
• Add: DBG_DRIVER to report SDL debug info
• Add: Frame update rate reporting in gslc-ex04
• Change: SDL1.2 now selects SDL_FULLSCREEN mode
• Change: Touch event handler to be more robust
• Change: Config adds DRV_SDL_RENDER_ACCEL (select between software and hardware renderer for SDL2). Default to 1.
• Change: Config defaults DRV_SDL_FIX_START to 0
• Change: Added math lib dependency (to support upcoming radial control)
• Fix: Mouse handling in SDL2
• Fix: Added missing dependency in Makefile
• Migration Notes (from 0.8.6):
  • Add #define DRV_SDL_RENDER_ACCEL to GUIslice_config.h
  • Add -lm to Makefile linker options

As always, I welcome suggestions, feedback or code contributions! ([email protected])