Add an explanation about why the project lacks software.

software/README.md

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+# Project software
+Software refers to applications running on high power processing (usually requiring more than 3V) and integrated memory management unix (MMU) systems with a monolithic operating system.
+
+## Software requirements
+This project does not include requirements for any software at all, and it's unknown if project requirements can be broadened to include software.
+
+The project **does specify** a limited number of sample applications running in firmware, along with corresponding documentation.