Txt2Tags Reader: Added copyright information

src/Text/Pandoc/Readers/Txt2Tags.hs

@@ -1,5 +1,31 @@
 {-# LANGUAGE ViewPatterns #-}
+{-
+Copyright (C) 2014 Matthew Pickering <matthewtpickering@gmail.com>
 
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+-}
+
+{- |
+   Module      : Text.Pandoc.Readers.Txt2Tags
+   Copyright   : Copyright (C) 2014 Matthew Pickering
+   License     : GNU GPL, version 2 or above
+
+   Maintainer  : Matthew Pickering <matthewtpickering@gmail.com>
+
+Conversion of txt2tags formatted plain text to 'Pandoc' document.
+-}
 module Text.Pandoc.Readers.Txt2Tags ( readTxt2Tags
                                     , getT2TMeta
                                     , T2TMeta (..)