Mark 1.3 as no longer in development / bump project template to require Wagtail 1.4a0

CHANGELOG.txt

@@ -6,7 +6,7 @@ Changelog
 
  * The `Document` model can now be overridden using the new `WAGTAILDOCS_DOCUMENT_MODEL` setting (Alex Gleason)
 
-1.3 (xx.xx.xxxx)
+1.3 (23.12.2015)
 ~~~~~~~~~~~~~~~~
 
  * Django 1.9 support

docs/releases/1.3.rst

@@ -1,6 +1,6 @@
-==========================================
-Wagtail 1.3 release notes - IN DEVELOPMENT
-==========================================
+=========================
+Wagtail 1.3 release notes
+=========================
 
 .. contents::
     :local:

wagtail/project_template/requirements.txt

@@ -1,2 +1,2 @@
 Django>=1.9,<1.10
-wagtail==1.3rc1
+wagtail==1.4a0