Update yaml parsing library

diff --git a/src/github.com/go-yaml/yaml b/src/github.com/go-yaml/yaml
index f7716cbe52baa25d2e9b0d0da546fcf909fc16b4..a83829b6f1293c91addabc89d0571c246397bbf4 160000 (submodule)
--- a/src/github.com/go-yaml/yaml
+++ b/src/github.com/go-yaml/yaml
@@ -1 +1 @@
-Subproject commit f7716cbe52baa25d2e9b0d0da546fcf909fc16b4
+Subproject commit a83829b6f1293c91addabc89d0571c246397bbf4