shape ops work in progress

refined line/quad intersection, made more robust
still working on edge cases

git-svn-id: http://skia.googlecode.com/svn/trunk@6017 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/EdgeDemoApp.mm b/experimental/Intersection/EdgeDemoApp.mm
index b65a295..8acc283 100644
--- a/experimental/Intersection/EdgeDemoApp.mm
+++ b/experimental/Intersection/EdgeDemoApp.mm
@@ -16,9 +16,9 @@
     };
 protected:
     virtual void onDraw(SkCanvas* canvas) {
-        static int step = 0; // 12752; // 17908 ; // 17904; // drawLetters first error
+        static int step = 0; // 17909 ; // drawLetters first error
                              // drawStars triggers error at 23275
-                             // error is not easy to debug in its current state
+                             // drawStars error not easy to debug last time I checked
         static double seconds;
         if (step == -1) {
             timeval t;