Try to make GitHub see this as a OCaml project

Chris00 · Chris00 · commit 1ba34e52093c · 2015-03-24T15:24:53.000+01:00
There is not a single line of SML.
diff --git a/.gitattributes b/.gitattributes
@@ -0,0 +1 @@
+*.ml linguist-language=OCaml
