added git-annex remotedaemon

So far, handling connecting to git-annex-shell notifychanges, and
pulling immediately when a change is pushed to a remote.

A little bit buggy (crashes after the first pull), but it already works!

This commit was sponsored by Mark Sheppard.

Command/RemoteDaemon.hs

@@ -0,0 +1,24 @@
+{- git-annex command
+ -
+ - Copyright 2014 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.RemoteDaemon where
+
+import Common.Annex
+import Command
+import RemoteDaemon.Core
+
+def :: [Command]
+def = [noCommit $ command "remotedaemon" paramNothing seek SectionPlumbing
+	"detects when remotes have changed, and fetches from them"]
+
+seek :: CommandSeek
+seek = withNothing start
+
+start :: CommandStart
+start = do
+	liftIO runForeground
+	stop