The ReferenceNode (digital reference) is now working, although its
functionality is limited. Currently, only one channel can serve
as a reference. Ideally, each channel or subset of channels could
have a unique reference. This will require additional UI upgrades
that are not a priority at the moment.

Some caveats:
- If a source doesn't generate its own timestamps, all timestamps will be
  zero. This is obviously bad, so we need a way to protect this
  from happening.
- If there are multiple timestamps from different sources, they might
  conflict. Again, something needs to be done about this in the near future.
- If only a 32-bit timestamp is given, it needs to be shifted by 8 bits
  to fit in our 64-bit timestamp slot

To run this in the future, install astyle (sudo apt-get install astyle),
then enter the following from the top-level project directory:

astyle --options=astyle.options --recursive "./Source/*.cpp" "./Source/*.h"

This will convert tabs to 4 spaces and ensure that brackets are on
their own lines.

With new jucer, windows.h is not only unnecesary, but can cause conflicts with some definitions.
Also, OpenGL.h includes disabled, as it's no longer needed and it, by itself, needs windows.h