Provide utilities for convenient plotting of channels

Implement a set of utilities (along with basic examples) to
make it so that we can readily make plots of individual channels
from logfiles (or live on the robot).

Change-Id: Ic648c9ccb9dcb73419dc2c8c4c395fdea0536110
diff --git a/frc971/analysis/live_web_plotter_demo.sh b/frc971/analysis/live_web_plotter_demo.sh
new file mode 100755
index 0000000..4c4c9c4
--- /dev/null
+++ b/frc971/analysis/live_web_plotter_demo.sh
@@ -0,0 +1 @@
+./aos/network/web_proxy_main --config=aos/network/www/test_config.json --data_dir=frc971/analysis