Add missing word to README.md

README.md

 # MacFound
 
-Repository of open source code specific MacArthur Foundation internal
-projects.
+Repository of open source code specific to MacArthur Foundation
+internal projects.
 
 The code here is unlikely to be of general use, because it is highly
 specific to the needs and datasets of the [MacArthur
@@ -9,7 +9,25 @@ Foundation](https://www.MacFound.org).  We release it as open source
 anyway, because that's our usual practice and because some of it could
 serve as an example or a template for other similar efforts.
 
-Right now the things most likely to be useful in here are the
-[refresh](refresh) script and how it drives [fix-csv](fix-csv) and
-[csv2wiki](https://github.com/OpenTechStrategies/ots-tools/blob/master/csv2wiki)
-to convert a CSV file to pages in a MediaWiki instance.
+* CSV->Wiki
+
+  Right now the things most likely to be useful in here is the
+  CSV->wiki conversion system.
+
+  Start from the [wiki-refresh](wiki-refresh) script and see how it
+  drives first [fix-csv](fix-csv), which performs some one-time
+  transformations to a specific CSV file from the MacArthur
+  Foundation, and then runs the transformed CSV through the
+  general-purpose script
+  [csv2wiki](https://github.com/OpenTechStrategies/ots-tools/blob/master/csv2wiki)
+  to create pages in a [MediaWiki](https://www.mediawiki.org/)
+  instance.
+
+  This system has been tested with MediaWiki 1.28.  There are a few
+  notes in
+  [csv2wiki](https://github.com/OpenTechStrategies/ots-tools/blob/master/csv2wiki)'s
+  documentation about things to watch out for with MediaWiki, e.g.,
+  you might have to run MediaWiki's `rebuildall.php` script to get the
+  categories feature working, some MediaWiki instances may have
+  spam-prevention features enabled that prevent csv2wiki from creating
+  pages containing URLs, etc.