Manifest updates

Change 'entry web page' to 'this web page' as per discussion on GitHub.

Rebuilt .entry.json and index.html files for all entries.

2018/mills/.entry.json

@@ -47,7 +47,7 @@
 	    "OK_to_edit" : false,
 	    "display_as" : "html",
 	    "display_via_github" : false,
-	    "entry_text" : "entry home page"
+	    "entry_text" : "this web page"
 	},
 	{
 	    "file_path" : ".entry.json",

2018/mills/index.html

@@ -782,7 +782,7 @@ time…</p>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
-<li><a href="index.html">index.html</a> - entry home page</li>
+<li><a href="index.html">index.html</a> - this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/mills/README.md">README.md</a> - markdown source for index.html</li>
 <li><a href="boot.dat">boot.dat</a> - binary support file</li>
 <li><a href="bsd.img.bz2">bsd.img.bz2</a> - bz2 compressed BSD disk image</li>