Add missing changelog entries for 0.3.0

Author: ashb

README.md

@@ -10,3 +10,5 @@ sphinx-argparse
 A sphinx extension that automatically documents argparse commands and options.
 
 For installation and usage details see the [documentation](http://sphinx-argparse.readthedocs.org/en/latest/). The changelog is also [found there](http://sphinx-argparse.readthedocs.org/en/latest/changelog.html).
+
+This project used to live at [alex-rudakov/sphinx-argparse](https://github.com/alex-rudakov/sphinx-argparse/) that the original maintainer disappears so I have taken over the project under this new home.

docs/changelog.rst

@@ -2,6 +2,12 @@
 Change log
 **********
 
+0.3.0
+#####
+
+ * First release from ashb/sphinx-argparse
+ * Declare that parallel builds are supported (issue #131).
+
 0.2.5
 #####