Fix source & header file includes in MSVC++

- Fix accidental merging of old files
  * Remove include/nomlib/graphics/Display.hpp
  * Remove src/graphics/Display.cpp
  * Remove src/graphics/Line.cpp

- Take care of a couple additional files
  * Remove include/nomlib/json.hpp
  * Add missing src/resources.cpp
Remove files that were accidentally merged in from rebasing earlier