FIX: added missing "client" codes

Author: Jens-G

build/generate-changes.py

@@ -149,10 +149,12 @@
     "erl": "Erlang",
     "erlang": "Erlang",
     "go": "Go",
+    "gv": "Graphviz",
     "haskell": "Haskell",
     "haxe": "Haxe",
     "hs": "Haskell",
     "hx": "Haxe",
+    "md": "Markdown",
     "java": "Java",
     "js": "JavaScript",
     "lua": "Lua",