Change number of samples from int16 to uint16, as this should
never be negative. Change timestamp from uint64 to int64, as
negative timestamps may one day be necessary.

The RecordNode was accidentally starting the timestamp at the
beginning of the event buffer, rather than at byte #4.

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

Use the following command to update the copyright year in all files,
starting in the Source/ directory:

find . -type f -print0 | xargs -0
   sed -i 's/Copyright (C) 2012/Copyright (C) 2013/g'

Works like a charm!

Channel selector buttons now can be used to toggle audio monitoring
for individual channel. One minor bug: the array of channels to monitor
is not updated when the graph is rebuilt. If new processors are added,
the mapping might be wrong.

The waveform icons should be made a bit thicker, but otherwise these look cool.

Whenever files are needed for recording, the RecordNode opens them. When
they are no longer necessary (either recording has stopped, or recording
of a particular channel has stopped), the RecordNode closes them.