Correct licensing info per author's instructions.

I discussed the licensing of this file with Tom Marble, and he agreed in
IRC that LGPLv2.1-or-later is the proper license.

  <bkuhn> tmarble: in 2013-01 you sent me some scripts for ods2xls
  <bkuhn> you mention they're based on ssconv
  <bkuhn> but they don't have license info
  <bkuhn> I was putting it into a public repository and then figured I should
          ask you first.  [11:45]
  <tmarble> oh my.. I will look  [11:46]
  <bkuhn> tmarble: if you figure it out, I can commit the files and you can add
          a license.  [11:47]
  <bkuhn> the lib is lgpl'd, that's marked
  <bkuhn> (although you didn't mark your copyright notice if you canged it)
  <tmarble>
            http://www.linuxjournal.com/content/convert-spreadsheets-csv-files-python-and-pyuno
                                                                        [11:57]
  <tmarble> bkuhn: sorry this was sort of a small, hacky script and didn't get
            the "full treatment"  [11:58]
  <tmarble> clearly it should be LGPLv2+
  <bkuhn> tmarble: do you recall if you modified the library as well as the
          script?  [12:07]
  <bkuhn> I see you put this in the lib:
  <bkuhn> #   PyODConverter (Python OpenDocument Converter) v1.0.0 - 2008-05-05
  <bkuhn> #   Copyright (C) 2008 Mirko Nasato <mirko@artofsolving.com>
  <bkuhn> #   Licensed under the GNU LGPL v2.1 - or any later version.
  <bkuhn> #   http://www.gnu.org/licenses/lgpl-2.1.html
  <bkuhn> and no copyright notices in the main program file
  <bkuhn> can you tell me what it should be?
  <tmarble> bkuhn: IIRC I did not modify ooutils  [12:09]
  <tmarble> bkuhn: yeah, sorry about that.. it's not even in VCS  [12:10]
  <bkuhn> It's ok.
  <bkuhn> I'm putting it public in my small hacks directory.
  <tmarble> bkuhn: as I mentioned before let's stick with LGPLv2.1+
  <bkuhn> As I use it all the time.
  <bkuhn> and someone else might find it useful
  <bkuhn> I believe one has a moral duty to share all software. :)
  <tmarble> please feel free to adjust the headers!
  <bkuhn> tmarble: may I quote this conversation  in the Git log?
  <tmarble> bkuhn: I loved karen's citing your quote "You may say I'm a dreamer,
            but I'm not the only one."  [12:11]
 <tmarble> bkuhn: yes

ods2xls.py

@@ -5,6 +5,23 @@
 #  https://help.libreoffice.org/Common/About_Converting_Microsoft_Office_Documents
 #  http://wiki.openoffice.org/wiki/Documentation/DevGuide/Spreadsheets/Filter_Options
 #  http://linuxsleuthing.blogspot.com/2012/01/unoconv-is-number-one.html
+#
+# Copyright © 2013, Tom Marble.
+#
+# This software's license gives you freedom; you can copy, convey,
+# propogate, redistribute and/or modify this program under the terms of
+# the GNU  Lesser General Public License (LGPL) as published by the Free
+# Software Foundation (FSF), either version 2.1 of the License, or (at your
+# option) any later version of the LGPL published by the FSF.
+#
+# 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 Lesser General Public License
+# along with this program in a file in the toplevel directory called
+# "LGPLv2.1".  If not, see <http://www.gnu.org/licenses/>.
 
 import os
 import ooutils