Add babel translations

babel.cfg

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+[python: **.py]
+[jinja2: **/templates/**.html.jinja2]
+extensions=jinja2.ext.autoescape,jinja2.ext.with_,jinja2.ext.do

babel.sh

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+#!/bin/sh
+pybabel extract -F babel.cfg -k _ -k __ -k ngettext -o hgapp/translations/messages.pot .
+pybabel update -D hgapp -i hgapp/translations/messages.pot -d hgapp/translations

hgapp/translations/messages.pot

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+# Translations template for PROJECT.
+# Copyright (C) 2017 ORGANIZATION
+# This file is distributed under the same license as the PROJECT project.
+# FIRST AUTHOR <EMAIL@ADDRESS>, 2017.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PROJECT VERSION\n"
+"Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
+"POT-Creation-Date: 2017-10-12 01:38+0530\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Babel 2.5.1\n"
+
+#: hgapp/views/login.py:21
+msgid "You are now logged out"
+msgstr ""
+
+#: hgapp/views/login.py:43
+msgid "You denied the request to login"
+msgstr ""
+
+#: hgapp/views/login.py:46
+msgid "Error: {error}"
+msgstr ""
+
+#: hgapp/views/login.py:49
+msgid "NA"
+msgstr ""
+