Move the reference documentation into the wiki, keep the README short (#61)

The twelve sections of the 992-line README are now wiki pages
(https://git.nockal.com/meleki/game-maker/wiki, wiki commit 9be1294),
content unchanged. The README keeps what it is, the quick start and
an index of the pages.

.prettierignore

@@ -4,6 +4,6 @@ data/
 index.html
 package-lock.json
 
-# Markdown is left alone: Prettier pads table cells to equal width, which turns the
-# README's long glossary rows into 1000-character lines.
+# Markdown is left alone: Prettier pads table cells to equal width, which turns a
+# long table row into a 1000-character line.
 *.md