Update Python packages to more recent versions, including required fix in templates

Verified working with Python 2.7.10

requirements.txt

@@ -1,29 +1,29 @@
 Flask==0.10.1
-Flask-Bootstrap==3.3.2.1
+Flask-Bootstrap==3.3.5.7
-Flask-Login==0.2.11
+Flask-Login==0.3.2
-Jinja2==2.7.3
+Jinja2==2.8
 MarkupSafe==0.23
 Paste==2.0.2
-WebOb==1.4.1
+WebOb==1.5.1
-Werkzeug==0.10.4
+Werkzeug==0.11.4
-argparse==1.3.0
+argparse==1.4.0
-cffi==0.9.2
+cffi==1.5.2
-cryptography==0.9
+cryptography==1.2.3
-decorator==3.4.2
+decorator==4.0.9
-enum34==1.0.4
+enum34==1.1.2
-gunicorn==19.3.0
+gunicorn==19.4.5
-idna==1.1
+idna==2.0
-ipaddress==1.0.7
+ipaddress==1.0.16
 itsdangerous==0.24
 pyOpenSSL==0.15.1
-pyasn1==0.1.7
+pyasn1==0.1.9
-pycparser==2.13
+pycparser==2.14
 pycrypto==2.6.1
-pysaml2==2.4.0
+pysaml2==4.0.3
-python-dateutil==2.4.2
+python-dateutil==2.5.0
-pytz==2015.4
+pytz==2015.7
 repoze.who==2.2
-requests==2.7.0
+requests==2.9.1
-six==1.9.0
+six==1.10.0
 wsgiref==0.1.2
-zope.interface==4.1.2
+zope.interface==4.1.3

templates/base.html

@@ -16,7 +16,7 @@
         </div>
         <div id="navbar" class="collapse navbar-collapse">
           <ul class="nav navbar-nav">
-	    {% if current_user.is_authenticated() %}
+	    {% if current_user.is_authenticated %}
             <li><a href="{{ url_for('logout') }}">Logout</a></li>
 	    {% endif %}
           </ul>
@@ -28,4 +28,3 @@
   {% block content %}
   </div>
 {% endblock %}
-    

templates/main_page.html

@@ -1,6 +1,6 @@
 {% extends 'base.html' %}
 {% block content %}
-{% if current_user.is_authenticated() %}
+{% if current_user.is_authenticated %}
 <div class="container">
   <h1>Logged in</h1>
   <p class="lead">