Document changes for version 1.9.1

Author: iMichka

CHANGELOG.md

@@ -4,6 +4,17 @@ Changes
 Version 1.9.1
 -------------
 
+1. Fix bug in the ```find_noncopyable_vars``` method which wrongly returned
+   member variables of pointer type (#84)
+
+2. Fix bug in the ```smart_pointer_traits.value_type``` and
+   ```auto_pointer_traits.value_type``` methods which didn't find the expected
+   ```value_type``` declaration (#85)
+
+3. Fix bug in the ```smart_pointer_traits.is_smart_pointer``` and
+   ```auto_pointer_traits.is_smart_pointer``` methods which didn't properly
+   work (#85)
+
 Version 1.9.0
 -------------