Add a changelog for version 0.7.0

Author: Vladimir Smirnov

CHANGES.md

@@ -0,0 +1,17 @@
+CHANGELOG
+---------
+
+**0.7.0**
+ - Render reuqests with globs now sent as-is.
+ - Added ProxyHeaders handler to get real client's ip address from X-Real-IP or X-Forwarded-For headers.
+ - Highest\* and Lowest\* now assumes '1' if no second argument was passed
+ - Implement legendValue expression (see http://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.legendValue for more information)
+
+Notes on migration:
+It's highly recommended, if you use carbonzipper to also upgrade it to version 0.62
+
+**0.6.0**
+ - Migrate to protobuf3
+
+**<=0.5.0**
+There is no dedicated changelog for older versions of carbonapi. Please see commit log for more information about what changed for each commit.