bandpass filter setting seem to work only when set before acquiring data for the 1st time

Fixes a bug with my previous change that would crash the program if you
tried to change the parameters of a processor without a parameterEditor.

Allows parameters to be set from saved XML and changes the
parameterEditor buttons (currently for discrete parameters only) to
reflect which parameters are currently used by selected and
non-selected channels. This fixes a problem where the buttons would
always show what the last press was rather than the current values for
the active channels (e.g. If you changed the parameters on Channel 2,
and then switched to select only Channel 1, the GUI would incorrectly
indicate that the settings for Channel 2 were active). Additionally,
allows the user to see what parameter values are used for channels not
currently selected.

- Clean up methods in GenericProcessor
- File selection now happens outside of EditorViewport
- Add mechanism for saving custom parameters for individual channels
- Settings file is automatically saved at the start of recording

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.

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

The DataViewport was changing the size of Visualizers,
even when they were placed in their own DocumentWindow,
because "destroyTab" was only removing the tab from the
TabbedButtonBar, rather than the TabbedComponent.

Using ScopedPointers was causing memory leaks. It's worth tracking
down the source of these in the future, but for now, we'll leave
the code as it was before.

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!

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

Generic changes:

- Genuinely unused variables (-Wunused-variable): delete
  them. Sometimes add a comment if the variable is for an extension of
  the code that isn't done yet.

- Variables that became unused due to commented-out
  code (-Wunused-variable): comment out their definitions. Dirty, but
  that's because commenting out code instead of deleting it is
  dirty.

  Many of these are due to commented-out printlines that should have
  been log messages that only get emitted at high verbosity level.

Specific changes:

- SpikeObject.cpp (-Wunused-value): move initialization of loop
  variable into first for loop clause to silence the warning.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>