Specifying version key, to help automatic building tools to build the application.

Signed-off-by: Tim Fletcher <twoggle@gmail.com>

src/oauth.app

@@ -1,5 +1,6 @@
 {application, oauth, [
   {description, "Erlang OAuth implementation"},
+  {vsn, "dev"},
   {modules, [
     oauth,
     oauth_hmac_sha1,
@@ -16,4 +17,4 @@
     crypto,
     inets
   ]}
-]}.
+]}.