Fixed #21237 -- Added Australian English (en_AU) to locale conf

Adds Australian English (en_AU) to locale conf, which differs from
American English in date formatting and spelling, and continues
to diverge from British English in spelling (and first-day-of-week
according to the current en_GB locale format.py).

The transifex language project to match this patch has been requested.

django/conf/global_settings.py

@@ -63,6 +63,7 @@ LANGUAGES = (
     ('de', gettext_noop('German')),
     ('el', gettext_noop('Greek')),
     ('en', gettext_noop('English')),
+    ('en-au', gettext_noop('Australian English')),
     ('en-gb', gettext_noop('British English')),
     ('eo', gettext_noop('Esperanto')),
     ('es', gettext_noop('Spanish')),

django/conf/locale/__init__.py

@@ -95,6 +95,12 @@ LANG_INFO = {
         'name': 'English',
         'name_local': 'English',
     },
+    'en-au': {
+        'bidi': False,
+        'code': 'en-au',
+        'name': 'Australian English',
+        'name_local': 'Australian English',
+    },
     'en-gb': {
         'bidi': False,
         'code': 'en-gb',

django/conf/locale/en_AU/formats.py

+# -*- encoding: utf-8 -*-
+# This file is distributed under the same license as the Django package.
+#
+from __future__ import unicode_literals
+
+# The *_FORMAT strings use the Django date format syntax,
+# see http://docs.djangoproject.com/en/dev/ref/templates/builtins/#date
+DATE_FORMAT = 'j M Y'                   # '25 Oct 2006'
+TIME_FORMAT = 'P'                       # '2:30 pm'
+DATETIME_FORMAT = 'j M Y, P'            # '25 Oct 2006, 2:30 pm'
+YEAR_MONTH_FORMAT = 'F Y'               # 'October 2006'
+MONTH_DAY_FORMAT = 'j F'                # '25 October'
+SHORT_DATE_FORMAT = 'd/m/Y'             # '25/10/2006'
+SHORT_DATETIME_FORMAT = 'd/m/Y P'       # '25/10/2006 2:30 pm'
+FIRST_DAY_OF_WEEK = 1                   # Monday
+
+# The *_INPUT_FORMATS strings use the Python strftime format syntax,
+# see http://docs.python.org/library/datetime.html#strftime-strptime-behavior
+DATE_INPUT_FORMATS = (
+    '%d/%m/%Y', '%d/%m/%y',             # '25/10/2006', '25/10/06'
+    # '%b %d %Y', '%b %d, %Y',          # 'Oct 25 2006', 'Oct 25, 2006'
+    # '%d %b %Y', '%d %b, %Y',          # '25 Oct 2006', '25 Oct, 2006'
+    # '%B %d %Y', '%B %d, %Y',          # 'October 25 2006', 'October 25, 2006'
+    # '%d %B %Y', '%d %B, %Y',          # '25 October 2006', '25 October, 2006'
+)
+DATETIME_INPUT_FORMATS = (
+    '%Y-%m-%d %H:%M:%S',                # '2006-10-25 14:30:59'
+    '%Y-%m-%d %H:%M:%S.%f',             # '2006-10-25 14:30:59.000200'
+    '%Y-%m-%d %H:%M',                   # '2006-10-25 14:30'
+    '%Y-%m-%d',                         # '2006-10-25'
+    '%d/%m/%Y %H:%M:%S',                # '25/10/2006 14:30:59'
+    '%d/%m/%Y %H:%M:%S.%f',             # '25/10/2006 14:30:59.000200'
+    '%d/%m/%Y %H:%M',                   # '25/10/2006 14:30'
+    '%d/%m/%Y',                         # '25/10/2006'
+    '%d/%m/%y %H:%M:%S',                # '25/10/06 14:30:59'
+    '%d/%m/%y %H:%M:%S.%f',             # '25/10/06 14:30:59.000200'
+    '%d/%m/%y %H:%M',                   # '25/10/06 14:30'
+    '%d/%m/%y',                         # '25/10/06'
+)
+DECIMAL_SEPARATOR = '.'
+THOUSAND_SEPARATOR = ','
+NUMBER_GROUPING = 3