Added readme.

README.md

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+Contribution (plugin for Omeka)
+===============================
+
+
+Summary
+-------
+
+This plugin for [Omeka] provides a way to collect stories, images, or other
+files from the public and manage those contributions in your Omeka archive as
+items. The form can also automatically add a reCAPTCHA box at the bottom of each
+form to prevent spam-bots from spamming your website.
+
+For more information, see the [Contribution presentation] on [Omeka] and the
+[update] done for Omeka 2.
+
+
+Installation
+------------
+
+Contribution depends on the [Guest User] plugin. You will need to install it
+before you can install [Contribution].
+
+Uncompress files and rename plugin folder "Contribution".
+
+Then install it like any other Omeka plugin.
+
+Settings are not on the plugin page, but at https://www.example.com/admin/contribution/index.
+
+
+Warning
+-------
+
+Use it at your own risk.
+
+It's always recommended to backup your files and database so you can roll back
+if needed.
+
+
+Troubleshooting
+---------------
+
+See online issues on [Contribution issues] page on GitHub.
+
+
+License
+-------
+
+This plugin is published under [GNU/GPL].
+
+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 3 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.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+Contact
+-------
+
+Current maintainers:
+
+* Roy Rosenzweig Center for History and New Media
+
+
+Copyright
+---------
+
+* Copyright Roy Rosenzweig Center for History and New Media, 2010-2013
+* Copyright Daniel Berthereau, 2014 (improvements, see [Daniel-KM])
+
+
+[Omeka]: https://omeka.org
+[Contribution presentation]: http://omeka.org/codex/Plugins/Contribution
+[update]: http://omeka.org/codex/Plugins/Contribution_2.0
+[Contribution]: https://github.com/Omeka/plugin-Contribution
+[Contribution issues]: https://github.com/Omeka/plugin-Contribution/issues
+[Guest User]: https://github.com/Omeka/plugin-GuestUser
+[GNU/GPL]: https://www.gnu.org/licenses/gpl-3.0.html "GNU/GPL v3"
+[Daniel-KM]: https://github.com/Daniel-KM "Daniel Berthereau"