Add changelog to sphinx doc

doc/whats_new/v0.7.rst

@@ -4,9 +4,19 @@ Version 0.7
 New features
 ------------
 
+* Models queue has now a customizable size (model_queue_size).
+* Add log-uniform prior to Integer space
+* Support for plotting categorical dimensions
+
 Bug fixes
 ---------
-* Fixed build with newest scikit-learn
+
+* Allow BayesSearchCV to work with sklearn 0.21
+* Reduce the amount of deprecation warnings in unit tests
 
 Maintenance
 -----------
+
+* joblib instead of sklearn.externals.joblib
+* Improve travis CI unit tests (Different sklearn version are checked)
+* Added `versioneer` support, to keep things simple and to fix pypi deploy