Create README.md

Author: alexellis

README.md

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+# python27-flask-template
+Python 2.7 OpenFaaS template with Flask
+
+To try this out:
+
+```bash
+faas template pull https://github.com/alexellis/python27-flask-template
+faas new --lang python27-flask myfunction
+mv myfunction.yml stack.yml
+
+```
+
+Followed by the usual flow:
+
+```
+faas build \
+  && faas deploy
+  && faas list --verbose
+
+# Wait a couple of seconds then:
+
+echo -n content | faas invoke myfunction
+```