Add README

Author: jaredthecoder

README.md

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+# CSAS Demo Runner
+
+The demo runner for PHP-CSAS.
+
+## How to Run
+
+- Make sure you have both Python (2.X) and Vagrant installed.
+- Install python dependencies with `pip install -r requirements.txt`.
+- Run `run_csas.sh` to run the demo with csas enabled.
+- Run `run_no_csas.sh` to run the demo without CSAS enabled.