make the check_old_style_urlconf not crash and burn if wagtailimages_serve has not been added to urls.py
Merge branch 'master' into kaedroho-project-template
update docs to refer to the 'wagtail' command rather than 'wagtail-project'
Remove wagtail template documentation from wagtail/project_template/readme.rst, as that's now covered by the main wagtail docs