add elixir tutorial to docs

docs/changelog.rst

@@ -57,7 +57,7 @@ Features
 - added `populate_default` bool argument to :meth:`Column.create <migrate.changeset.schema.ChangesetColumn.create>` which issues corresponding UPDATE statements to set defaults after column creation
 - :meth:`Column.create <migrate.changeset.schema.ChangesetColumn.create>` accepts `primary_key_name`, `unique_name` and `index_name` as string value which is used as contraint name when adding a column
 
-Bug fixes
+Fixed bugs
 *****************
 
 - ORM methods now accept `connection` parameter commonly used for transactions

docs/index.rst

@@ -123,6 +123,14 @@ Dialect support
 .. [#4] Changing nullable is not supported
 
 
+Tutorials
+--------------
+
+List of useful tutorials:
+
+* `Using migrate with Elixir <http://www.karoltomala.com/blog/?p=633>`_
+
+
 User guide
 -------------