request.coffee in unpoly-rails-1.0.1

- old
+ new

@@ -149,9 +149,10 @@
       unless u.isBlank(xhrParams)
         delete xhrHeaders['Content-Type'] # let the browser set the content type
         xhrPayload = xhrParams.toFormData()
 
       pc = up.protocol.config
+      xhrHeaders[pc.versionHeader] = up.version
       xhrHeaders[pc.targetHeader] = @target if @target
       xhrHeaders[pc.failTargetHeader] = @failTarget if @failTarget
       xhrHeaders['X-Requested-With'] ||= 'XMLHttpRequest' unless @isCrossDomain()
       if csrfToken = @csrfToken()
         xhrHeaders[pc.csrfHeader] = csrfToken