2016-11-26: smaller ensemble for testing

smaller ensemble for testing

diff --git a/examples/ensemble-estimation.w b/examples/ensemble-estimation.w
--- a/examples/ensemble-estimation.w
+++ b/examples/ensemble-estimation.w
@@ -298,8 +298,8 @@ define : flatten li
 
 define : main args
     let*
-      : ensemble-member-count 256
-        ensemble-member-plot-skip 16
+      : ensemble-member-count 32
+        ensemble-member-plot-skip 4
         optimized : EnSRT H x^b P y⁰ R y⁰-pos ensemble-member-count
         x-opt : list-ref optimized 0
         x-deviations : list-ref optimized 1