Manifest updates

Typo fixes and change 'download entry source' to 'download entry' as
it's the tarball, not the source itself.

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

2004/gavin/.entry.json

@@ -95,7 +95,7 @@
 	    "OK_to_edit" : false,
 	    "display_as" : "tbz2",
 	    "display_via_github" : false,
-	    "entry_text" : "download entry source"
+	    "entry_text" : "download entry"
 	},
 	{
 	    "file_path" : "index.html",

2004/gavin/index.html

@@ -289,7 +289,7 @@ at which a Linux bootloader loads an x86 kernel image).</p>
 <li><a href="img/fs.tar">img/fs.tar</a> - tar of root file system</li>
 <li><a href="img/kernel">img/kernel</a> - Linux kernel x86 boot executable zImage</li>
 <li><a href="prim">prim</a> - prime number printing program</li>
-<li><a href="2004_gavin.tar.bz2">2004_gavin.tar.bz2</a> - download entry source</li>
+<li><a href="2004_gavin.tar.bz2">2004_gavin.tar.bz2</a> - download entry</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>