move Stdin module to IHaskell

This allows removing the unix dependency for ipython-kernel, and seems
like the right thing to do as the Stdin module is very specific to the
case of running a Haskell kernel.

ihaskell.cabal

@@ -114,6 +114,7 @@ library
                    IHaskell.Eval.ParseShell
                    IHaskell.Eval.Util
                    IHaskell.IPython
+                   IHaskell.IPython.Stdin
                    IHaskell.Flags
                    IHaskell.Types
                    IHaskell.BrokenPackages

ipython-kernel/ipython-kernel.cabal

@@ -27,12 +27,10 @@ library
   exposed-modules: IHaskell.IPython.Kernel
                    IHaskell.IPython.Types
                    IHaskell.IPython.ZeroMQ
-                   IHaskell.IPython.Stdin
                    IHaskell.IPython.Message.Writer
                    IHaskell.IPython.Message.Parser
                    IHaskell.IPython.Message.UUID
                    IHaskell.IPython.EasyKernel
-  -- other-modules:       
   other-extensions:    OverloadedStrings
   hs-source-dirs:      src
   default-language:    Haskell2010
@@ -47,12 +45,10 @@ library
                        tar             >=0.4.0.1,
                        text            >=0.11,
                        transformers    >=0.3,
-                       unix            >=2.6,
                        uuid            >=1.3,
                        zeromq4-haskell >=0.1,
                        SHA             >=1.6
 
-
 -- Example program
 executable simple-calc-example
   hs-source-dirs: examples
@@ -64,6 +60,6 @@ executable simple-calc-example
                   parsec         >=3.1,
                   text           >=0.11,
                   transformers   >=0.3
-                  
+
   if !flag(examples)
     buildable: False