Fixed #19092 -- Completed Lithuanian date/time formats

Thanks Tadas Dailyda for the report and the patch.

django/conf/locale/lt/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 = r'Y \m. F j \d.'
+DATE_FORMAT = r'Y \m. E j \d.'
 TIME_FORMAT = 'H:i:s'
-# DATETIME_FORMAT = 
-# YEAR_MONTH_FORMAT = 
-# MONTH_DAY_FORMAT = 
+DATETIME_FORMAT = r'Y \m. E j \d., H:i:s'
+YEAR_MONTH_FORMAT = r'Y \m. F'
+MONTH_DAY_FORMAT = r'E j \d.'
 SHORT_DATE_FORMAT = 'Y-m-d'
-# SHORT_DATETIME_FORMAT = 
-# FIRST_DAY_OF_WEEK = 
+SHORT_DATETIME_FORMAT = 'Y-m-d H:i'
+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 = 
-# TIME_INPUT_FORMATS = 
-# DATETIME_INPUT_FORMATS = 
+DATE_INPUT_FORMATS = (
+    '%Y-%m-%d', '%d.%m.%Y', '%d.%m.%y', # '2006-10-25', '25.10.2006', '25.10.06'
+)
+TIME_INPUT_FORMATS = (
+    '%H:%M:%S',     # '14:30:59'
+    '%H:%M',     # '14:30'
+    '%H.%M.%S', # '14.30.59'
+    '%H.%M', # '14.30'
+)
+DATETIME_INPUT_FORMATS = (
+    '%Y-%m-%d %H:%M:%S',     # '2006-10-25 14:30:59'
+    '%Y-%m-%d %H:%M',        # '2006-10-25 14:30'
+    '%d.%m.%Y %H:%M:%S',     # '25.10.2006 14:30:59'
+    '%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',        # '25.10.06 14:30'
+    '%d.%m.%y %H.%M.%S',     # '25.10.06 14.30.59'
+    '%d.%m.%y %H.%M',        # '25.10.06 14.30'
+    '%d.%m.%y',              # '25.10.06'
+)
 DECIMAL_SEPARATOR = ','
 THOUSAND_SEPARATOR = '.'
-# NUMBER_GROUPING = 
+NUMBER_GROUPING = 3