Bump version to 1.13.0

diff --git a/Makefile b/Makefile
index 495b16c..b50c722 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 1
 PATCHLEVEL = 13
 SUBLEVEL = 0
-EXTRAVERSION = .svn
+EXTRAVERSION =
 NAME = Unnamed
 
 # *DOCUMENTATION*