Improved README slightly

diff --git a/README.md b/README.md
index 838c502..29df917 100644 (file)
--- a/README.md
+++ b/README.md
@@ -3,11 +3,11 @@
 
 Victrix Abyssi's source code is copyright © 2005-2014 Martin Read, and is released under a BSD-style license as reproduced in the file LICENSE.
 
-## Building from git
-
-B
-
 ## Building from source archive
 
 When building from a packaged source archive, the traditional UNIX application installation-from-source command sequence <tt>\./configure && make all && make install</tt> should work.
 
+## Building from git
+
+Building from git currently requires an additional step before invoking the usual command sequence; you must run <tt>make headergen</tt> to generate the C++ form of the permobj database and its accompanying header file.
+