Add updated README to gh-pages branch

Author: ctrueden

README.md

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+This repository houses the
+[SciJava component status table](https://status.scijava.org/).
+
+SciJava maintainers use this table to see at a glance which components of the
+[SciJava component collection](https://imagej.net/develop/architecture#definitions):
+
+1. Have a newer release version than the one managed by the
+   [SciJava Bill of Materials](https://imagej.net/develop/architecture#bill-of-materials);
+2. Contain changes on the master branch which have not yet been released;
+3. Have broken CI builds.
+4. Have incompatibilities with other BOM components.
+
+Content here is driven by a continuous integration task in the
+[pom-scijava repository](https://github.com/scijava/pom-scijava).