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/Intersections.h b/experimental/Intersection/Intersections.h
index c1421e3..fe12b25 100644
--- a/experimental/Intersection/Intersections.h
+++ b/experimental/Intersection/Intersections.h
@@ -143,6 +143,8 @@
         ++fUsed;
     }
 
+    // FIXME: all callers should be moved to regular insert. Failures are likely
+    // if two separate callers differ on whether ts are equal or not
     void insertOne(double t, int side) {
         int used = side ? fUsed2 : fUsed;
         assert(used <= 1 || fT[side][0] < fT[side][1]);