Ignore a bunch of generated files.
diff --git a/.cvsignore b/.cvsignore
new file mode 100644
index 0000000..04a4a99
--- /dev/null
+++ b/.cvsignore
@@ -0,0 +1,8 @@
+.purify
+config.log
+config.h
+config.cache
+config.status
+Makefile
+buildno
+python