Changes to aos/vision/debug in preparation for the competition.

- blob_log-source: Support multiple key-commands for seeking to a target
 also added JustCheckForTarget which can be implemented to run faster
 for slow computer (will implement in followup).
- camera-source + debug_framework: Takes in camera parameters from the
caller.
- debug_window -> Scale text up on smaller monitors.
- overlay.h: Ben changed width to measure point to point on the cross.
  And added circles to the pixel-lines overlay.
- tcp-source: Drop packects when the computer can't keep up.
- debug_framework -> detect smaller monitors and scale down the viewport.

Change-Id: Iae65a0799231d006b38694a8a9cb3894e252033c
diff --git a/y2017/vision/debug_viewer.cc b/y2017/vision/debug_viewer.cc
index 83f306f..10dd57e 100644
--- a/y2017/vision/debug_viewer.cc
+++ b/y2017/vision/debug_viewer.cc
@@ -125,5 +125,6 @@
 
 int main(int argc, char **argv) {
   y2017::vision::FilterHarnessExample filter_harness;
-  aos::vision::DebugFrameworkMain(argc, argv, &filter_harness);
+  aos::vision::DebugFrameworkMain(argc, argv, &filter_harness,
+                                  aos::vision::CameraParams());
 }