Add authentication and the basis of the browser module.

A user authentication module based on flask-security is added, which
allows users to login and change/recover passwords etc. Custom templates
are included for the user/password UIs.

A new setup script will initialise the user (and later settings) DB,
adding the first user and granting them an Administrator role.

A redirects blueprint module is added to handle simple URL redirects.

A browser module is added and currently renders a skeleton page with
a menu bar, gravatar and jumbotron.

NOTE FOR LATER: Currently this code might make the nice basis for any
web app that needs user management and plugins. Hmmm....

web/pgadmin/redirects/views.py

@@ -0,0 +1,24 @@
+##########################################################################
+#
+# pgAdmin 4 - PostgreSQL Tools
+#
+# Copyright (C) 2013 - 2014, The pgAdmin Development Team
+# This software is released under the PostgreSQL Licence
+#
+##########################################################################
+
+"""A blueprint module providing URL redirects."""
+MODULE_NAME = 'redirects'
+
+import config
+from flask import Blueprint, redirect, url_for
+from flask.ext.security import login_required
+
+# Initialise the module
+blueprint = Blueprint(MODULE_NAME, __name__)
+
+@blueprint.route('/')
+@login_required
+def index():
+    """Redirect users hitting the root to the browser"""
+    return redirect(url_for('browser.index'))