Prepare v0.8.1 release

Author: clue

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.8.1 (2015-03-08)
+
+*   Support graph v0.9 (while keeping BC)
+    ([#16](https://github.com/graphp/algorithms/pull/16))
+
+*   Deprecate internal algorithm base classes
+    ([#15](https://github.com/graphp/algorithms/pull/15))
+
 ## 0.8.0 (2015-02-25)
 
 *   First tagged release, split off from [clue/graph](https://github.com/clue/graph) v0.8.0