Added a bit of documentation for new setup.py options

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@296 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/README

@@ -14,6 +14,11 @@ The default prefix is /usr, so files are put in /usr/bin,
 
 	python setup.py install --prefix=/usr/local
 
+A few special build arguments can be specified such as --librsync-dir,
+--lflags, and --libs, and the LIBRSYNC_DIR, LFLAGS, and LIBS
+environment variables will also be used.  Running setup.py with no
+arguments will also display some help.
+
 
 REQUIREMENTS: