Don't export TConf anymore and export DeConfig instead

WARNING: this patch may be breaking your configuration. While it is
still possible to use:

tabbed shrinkText defaultTConf

updating the fields of the defaultTConf record is not possible
anymore, since the type TConf is now hidden.

WARNING: "tabSize" has been substituted by "decoHeight"

You can change your configuration this way:
myTConf :: TConf
myTConf = defaultTConf
       { tabSize = 15
       , etc....

becomes:
myTConf :: DeConfig TabbedDecoration Window
myTConf = defaultTabbedConfig
       { decoHeight = 15
       , etc....

and
tabbed shrinkText myTConf

becomes:
tabDeco shrinkText myTConf

XMonad/Config/Arossato.hs

@@ -76,16 +76,16 @@ import XMonad.Prompt.XMonad
 
 -- | My configuration for the Tabbed Layout. Basically this is the
 -- Ion3 clean style.
-arossatoTabbedConfig :: TConf
-arossatoTabbedConfig =
-    defaultTConf { activeColor         = "#8a999e"
-                 , inactiveColor       = "#545d75"
-                 , activeBorderColor   = "white"
-                 , inactiveBorderColor = "grey"
-                 , activeTextColor     = "white"
-                 , inactiveTextColor   = "grey"
-                 , tabSize             = 15
-                 }
+arossatoTabbedConfig :: DeConfig TabbedDecoration Window
+arossatoTabbedConfig = defaultTabbedConfig
+                       { activeColor         = "#8a999e"
+                       , inactiveColor       = "#545d75"
+                       , activeBorderColor   = "white"
+                       , inactiveBorderColor = "grey"
+                       , activeTextColor     = "white"
+                       , inactiveTextColor   = "grey"
+                       , decoHeight          = 15
+                       }
 
 arossatoConfig = defaultConfig
          { workspaces         = ["home","var","dev","mail","web","doc"] ++
@@ -106,7 +106,7 @@ arossatoConfig = defaultConfig
          }
     where
       -- layouts
-      mytab = tabbed shrinkText arossatoTabbedConfig
+      mytab = tabDeco shrinkText arossatoTabbedConfig
       tiled = Tall 1 (3/100) (1/2)
 
       -- manageHook

XMonad/Config/Sjanssen.hs

@@ -29,7 +29,7 @@ sjanssenConfig = do
                 , ((modm, button2), (\w -> focus w >> windows W.swapMaster))
                 , ((modm.|. shiftMask, button1), (\w -> focus w >> mouseResizeWindow w)) ]
         , keys = \c -> mykeys c `M.union` keys defaultConfig c
-        , layoutHook = avoidStruts $ smartBorders (tiled Tall ||| tiled Wide ||| Full ||| tabbed shrinkText myTConf)
+        , layoutHook = avoidStruts $ smartBorders (tiled Tall ||| tiled Wide ||| Full ||| tabDeco shrinkText myTConf)
         , manageHook = manageHook defaultConfig <+> manageDocks
         }
  where
@@ -44,7 +44,7 @@ sjanssenConfig = do
         ]
 
     myFont = "xft:Bitstream Vera Sans Mono:pixelsize=10"
-    myTConf = defaultTConf { fontName = myFont }
+    myTConf = defaultTabbedConfig { fontName = myFont }
     myPromptConfig = defaultXPConfig
                         { position = Top
                         , font = myFont

XMonad/Layout/Tabbed.hs

@@ -25,7 +25,8 @@ module XMonad.Layout.Tabbed
       -- $usage
       tabbed
     , tabDeco
-    , TConf (..), defaultTConf
+    , defaultTConf
+    , DeConfig (..)
     , TabbedDecoration (..), defaultTabbedConfig
     , shrinkText, CustomShrink(CustomShrink)
     , Shrinker(..)