Use safety version of Jinja2 in examples [ci skip]

examples/my-freeze.txt

@@ -0,0 +1,26 @@
+#
+# This file is autogenerated by pip-compile
+# Make changes in dev-requirements.in, then run this to update:
+#
+#    pip-compile dev-requirements.in
+#
+apipkg==1.4               # via execnet
+autopep8==1.2.1
+click==6.2                # via pip-tools
+docutils==0.12
+execnet==1.4.1            # via pytest-cache
+first==2.0.1              # via pip-tools
+flask==0.10.1
+itsdangerous==0.24        # via flask
+jinja2==2.8               # via flask
+markupsafe==0.23          # via jinja2
+pep8==1.6.2               # via autopep8, pytest-pep8
+pip-tools==1.4.2
+py==1.4.31                # via pytest
+pytest-cache==1.0         # via pytest-pep8
+pytest-pep8==1.0.6
+pytest-pythonpath==0.7
+pytest==2.8.5             # via pytest-cache, pytest-pep8, pytest-pythonpath
+six==1.10.0               # via pip-tools
+werkzeug==0.11.2          # via flask
+wheel==0.26.0

examples/requirements.txt

@@ -7,7 +7,7 @@ alabaster==0.7.6
 Babel==2.1.1
 docutils==0.12
 gevent_subprocess==0.1.2
-Jinja2==2.8
+Jinja2>=2.8.1
 MarkupSafe==0.23
 Pygments==2.0.2
 pytz==2015.7