no functionality, just cloned the Lfp display

This reverts commit 46a11aba, reversing
changes made to 02637b37.

0.0 = Cosyne 2012
0.1 = SfN 2012
0.2 = alpha release
0.3 = beta release
1.0 = the REAL DEAL?

It's unused, declared obsolete, and is triggering GCC warnings. If
anyone wants it back, it'll be in the Git history.

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

updated the project build configs to include the SpikePlot.cpp and .h files and exclude the previous plotters