Add the basic readme file.

README.md

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+These programs represent simple clients for the System Fusion networking now built into the MMDVM Host. The parrot can be used as a functional replacement for the built-in parrot that was removed when the networking was added.
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+The reflector is a simple minded reflector that retransmits any received System Fusion data to other MMDVM Hosts logged into the reflector at the time.
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+Both programs take the UDP port number to listen on as an argument. The MMDVM .ini file should have the IP address and port number of the client in the [System Fusion Network] settings.
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+It builds on 32-bit and 64-bit Linux as well as on Windows using VS2015 on x86 and x64. It can optionally control various Displays. Currently these are:
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+This software is licenced under the GPL v2 and is intended for amateur and educational use only. Use of this software for commercial purposes is strictly forbidden.