Add CHANGELOG for the upcoming 0.1.0 release

CHANGELOG.rst

@@ -0,0 +1,11 @@
+0.1.0 -
+-------
+
+* Initial release of Cloudbridge
+* Support for Bucket, Instance, Instance type, Key pair, Machine image
+  Region, Security group, Security group, Snapshot and Volume services
+* Support for AWS and OpenStack clouds
+* Basic usage docs and 100% API docs
+* 95% test coverage
+* Support for AWS mock test provder (via
+  `moto <https://github.com/spulec/moto>`_)