Switch to side-by-side view

--- a/manifest.txt
+++ b/manifest.txt
@@ -206,8 +206,8 @@
 dirbrowser/standard.css
 doc/
 doc/Makefile
-doc/install.html
-doc/install.txt
+doc/building.html
+doc/building.txt
 doc/legend-upplay-main.png
 doc/legend-upplay-main.xcf
 doc/songcast.html