Add README.md to create front-page documentation for both Github repo and Doxygen

Author: eflumerf

README.md

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+# artdaq-daqinterface Front Page
+
+## About the framework
+
+The _artdaq_ toolkit is a data-acquisition framework designed for high-energy physics experiments. It provides a flexible, reliable backbone for data transfers and has several locations where users can perform custom analysis tasks using the _art_ framework.
+
+The _artdaq_ suite consists of the following packages:
+
+* [trace](https://art-daq.github.io/artdaq_doxygen/trace): High-performance message logging
+* [artdaq-core](https://art-daq.github.io/artdaq_doxygen/artdaq-core): Data formats used by the artdaq toolkit
+* [artdaq-utilities](https://art-daq.github.io/artdaq_doxygen/artdaq-utilities): Online tools, primarily metrics reporting
+* [artdaq-mfextensions](https://art-daq.github.io/artdaq_doxygen/artdaq-mfextensions): Extensions to the MessageFacility product which are useful in DAQ context
+* [artdaq](https://art-daq.github.io/artdaq_doxygen/artdaq): Application and data transfer framework
+* [artdaq-core-demo](https://art-daq.github.io/artdaq_doxygen/artdaq-core-demo): Data formats used by the artdaq demonstration system
+* [artdaq-demo](https://art-daq.github.io/artdaq_doxygen/artdaq-demo): "User" implementations for the artdaq demonstration system
+* [artdaq-daqinterface](https://art-daq.github.io/artdaq_doxygen/artdaq-daqinterface): Command line run control and example configurations
+* [artdaq-database](https://art-daq.github.io/artdaq_doxygen/artdaq-database): Bindings for MongoDB or local "filesystemdb" configuration databases
+* [artdaq-epics-plugin](https://art-daq.github.io/artdaq_doxygen/artdaq-epics-plugin): Metric endpoint for the EPICS control system
+
+## About this package
+
+This package is a Python-based run control implementation for _artdaq_, performing automatic system configuration and bookkeeping tasks. It also serves as the repository for the _artdaq-demo_ example configurations which are used as the _artdaq_ framework's regression test suite.