Squashed commit of the following:
Clean-up some include path problems introduced with the previous set of changes.
app/include/graphics, apps/NxWidgets/UnitTests: Update include paths for file in new location.
apps/NxWidgets/nxwidgets and nxwm: Update include paths for file in new location.
apps/graphics/NxWidgets: Move nxwidgets and nxwm include/ directories to apps/include/graphics
apps/examples/ft80x: Fix some size calculations. Add option to disable primitive tests... just too boring to have to watch over and over again.
apps/graphics/ft80x: Fix a typo in backlight fade logic; Fix error in formmatted display light debug dump output.
apps/graphics/ft80x: Fix some warnings when debug features are enabled.
apps/graphics/ft80x: Replace polling logic with gentler signal logic when waitinf for the CMD FIFO to become empty.
apps/examples/ft80x: Add first co-processor example.
apps/graphics: Extend library to manage display lists either in display memory (RAM DL) or provided directly to th co-processor FIFO (RAM CMD).
apps/examples/ft80x: Some minor clean-up. Trivial changes for coprocessor support.
apps/graphics/ft80x: Add support for accessing graphics ram. apps/examples/ft80x: Add more primitive graphics demos.
apps/examples/ft80x: Add a couple more demos of primitives. Use new ft80x_dl_create() to simplify.
apps/graphics/ft80x: Add ft80x_dl_create() which simplies writing of very simple display lists.
apps/examples/lvgldemo: Fix up some include paths
apps/examples/lvgldemo: The last final now conforms to the NuttX coding style.
apps/graphics/littlevgl: Two more files are closer to the NuttX coding style.
apps/graphics/littlevgl: Two more files are closer to the NuttX coding style.
apps/examples/lvgldemo: Three more files are closer to the NuttX coding style.
apps/examples/lvgldemo: Two more files are closer to the NuttX coding style.
apps/examples/lvgldemo: Two more files are closer to the NuttX coding style.
Add include/graphics/.gitignore
apps/include/graphics: Remove lvgl.h. graphics/littlevgl/Makefile now copies the file into position.
apps/graphics/littlevgl: Add .gitignore file
apps/graphics/littlevgl: Most of these files follow the coding style now.
apps/graphics/littlevgl: This gets a couple of files closer to the NuttX coding style.
apps/examples/lvgldemo: Add lvgldemo example
apps/graphics/littlevgl: Add littlevgl library
