Add PR ID to changelog

changelogs/master/added/20190927_unwrapped_bb_aug.md

@@ -1,4 +1,4 @@
-# Unwrapped Bounding Box Augmentation
+# Unwrapped Bounding Box Augmentation #446
 
 * Added property `coords` to `BoundingBox`. The property returns an `(N,2)`
   numpy array containing the coordinates of the top-left and bottom-right

changelogs/master/fixes/20190928_fixed_affine_coords_aug.md

@@ -1,3 +1,3 @@
 * Fixed `Affine` coordinate-based augmentation applying wrong offset
   when shifting images to/from top-left corner. This would lead to an error
-  of around 0.5 to 1.0 pixels.
+  of around 0.5 to 1.0 pixels. #446

changelogs/master/fixes/20190928_fixed_pwa_empty_kps_unaligned.md

@@ -1,2 +1,2 @@
 * Fixed keypoint augmentation in `PiecewiseAffine` potentially being
-  unaligned if a `KeypointsOnImage` instance contained no keypoints.
+  unaligned if a `KeypointsOnImage` instance contained no keypoints. #446

changelogs/master/fixes/20190928_fixed_type_val.md

@@ -1,2 +1,2 @@
 * Fixed `imgaug.validation.convert_iterable_to_string_of_types()` crashing due
-  to not converting types to strings before joining them.
+  to not converting types to strings before joining them. #446

changelogs/master/fixes/20190929_fixed_assert_is_iterable_of.md

@@ -1,2 +1,2 @@
 * Fixed `imgaug.validation.assert_is_iterable_of()` producing a not
-  well-designed error if the input was not an iterable.
+  well-designed error if the input was not an iterable. #446