Added new alias features to change log

Author: kmvanbrunt

CHANGELOG.md

@@ -11,6 +11,8 @@
         * ``allow_appended_space``
         * ``allow_closing_quote``
     * Due to the tab completion changes, non-Windows platforms now depend on [wcwidth](https://pypi.python.org/pypi/wcwidth).
+    * An alias name can now match a command name.
+    * An alias can now resolve to another alias.
 
 * Attribute Changes (Breaks backward compatibility)
     * ``exclude_from_help`` is now called ``hidden_commands`` since these commands are hidden from things other than help, including tab completion