Adds README

experiments/README.md

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+# Open Screen Experiments
+
+These are "design documents" describing experiments that collect data on the
+performance and efficiency of Open Screen protocol components.  The specific
+data will answer questions about efficiency, latency and reliability in the
+evaluation templates for [discovery](../templates/discovery.md)
+and [transport](../templates/transport.md).
+
+## Experiments
+
+The following designs have been submitted:
+- [Discovery Protocol Experimental Design](discovery.md)
+
+## Results
+
+Eventually results of these experiments will be posted here.
+