Some haddock docs.

diff --git a/Network/YAML/Balancer.hs b/Network/YAML/Balancer.hs
index 4c05fbe..bcef59a 100644
--- a/Network/YAML/Balancer.hs
+++ b/Network/YAML/Balancer.hs
@@ -4,12 +4,12 @@ module Network.YAML.Balancer where
 import System.Random
 import qualified Data.ByteString.Char8 as BS

-type Server = (BS.ByteString, Int)
+import Network.YAML.Base (HostAndPort)

 -- | Select random server
-selectRandom :: [(BS.ByteString, Server, Int)]   -- ^ [(Service name, (hostname, port number), priority)]
-             -> BS.ByteString                    -- ^ Service name
-             -> IO Server
+selectRandom :: [(BS.ByteString, HostAndPort, Int)]   -- ^ [(Service name, (hostname, port number), priority)]
+             -> BS.ByteString                         -- ^ Service name
+             -> IO HostAndPort
 selectRandom lst service = do
   let lst' = concatMap (\(name,srv,p) -> replicate p (name, srv)) lst
       lst'' = map snd $ filter (\(name,srv) -> name==service) lst'
diff --git a/Network/YAML/Caller.hs b/Network/YAML/Caller.hs
index f035072..dcaad0c 100644
--- a/Network/YAML/Caller.hs
+++ b/Network/YAML/Caller.hs
@@ -18,7 +18,7 @@ import Network.YAML.Server
 class Connection c where
   newConnection :: (BS.ByteString, Int) -> IO c
   closeConnection :: c -> IO ()
--- | Call remote method
+  -- | Call remote method
   call :: (IsYamlObject a, IsYamlObject b)
        => c
        -> BS.ByteString                   -- ^ Name of method
@@ -84,7 +84,7 @@ instance Connection PersistentConnection where
       Nothing -> fail "No answer"
       Just x -> return x

--- | Similar, but select server on each call
+-- | Similar to call, but select server on each call
 callDynamic :: (IsYamlObject a, IsYamlObject b)
             => (BS.ByteString -> IO (BS.ByteString,Int)) -- ^ Get (Host name, port number) from service name
             -> BS.ByteString                             -- ^ Name of the service
diff --git a/Network/YAML/Server.hs b/Network/YAML/Server.hs
index 3366276..2b9bb84 100644
--- a/Network/YAML/Server.hs
+++ b/Network/YAML/Server.hs
@@ -46,7 +46,9 @@ readHandle h acc = do
         then return acc
         else readHandle h (acc ++ [line'])

--- | Start server and wait for connections
+-- | Start server and wait for connections.
+-- This server closes connection after each query.
+-- So, each call is processed in another thread.
 server ::
       Int                              -- ^ Port number
    -> (YamlObject -> IO YamlObject)    -- ^ Worker
@@ -72,6 +74,9 @@ server port callOut = do
                     BS.hPutStrLn h $ serialize res
                     hClose h)

+-- | Start server and wait for connections.
+-- This server does not close connection after query.
+-- So, new thread is created only per-client, not per-query.
 persistentServer ::
       Int
    -> (YamlObject -> IO YamlObject)
diff --git a/Network/YAML/WrapMethods.hs b/Network/YAML/WrapMethods.hs
index 7adb28c..5129597 100644
--- a/Network/YAML/WrapMethods.hs
+++ b/Network/YAML/WrapMethods.hs
@@ -31,6 +31,9 @@ remote name = do
     sigD cName [t| (Connection c) => c -> $(return a) -> $(return ioB) |],
     funD cName [c]]

+-- | Similar to remote, but use it when basic function accepts additional argument,
+-- which should not be passed from client.
+-- (To be used in pair with declareRulesWithArg).
 remote' :: Name -> Q [Dec]
 remote' name = do
   srv <- newName "srv"