diff --git a/mathjax/LICENSE b/mathjax/LICENSE
new file mode 100644
index 00000000..6e29fda4
--- /dev/null
+++ b/mathjax/LICENSE
@@ -0,0 +1,24 @@
+Copyright (c) 2011-2013 Tobias Diekershoff
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+    * copyright notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the distribution.
+    * Neither the name of the <organization> nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/mathjax/README b/mathjax/README
deleted file mode 100644
index 023e1c89..00000000
--- a/mathjax/README
+++ /dev/null
@@ -1,31 +0,0 @@
-Addon for Friendika to include MathJax (LaTeX math syntax)
-
-This addon lets your users use LaTeX to type mathematical formulas
-within their posts. MathJax takes care about the best method for the
-browser to display the formula and provides compatibility to 99%
-of the modern browsers.
-
-You can either use the MathJax CDN online, thus loading the required javascript
-libraries from the MathJax cloud, or use a local installation of MathJax.
-Please see the plugin settings in the admin panel for configuration possibles.
-If you don't set up a local MathJax instance, leave the configuration untouched
-it will fall back to the MathJax cloud as default value.
-
-If you don't use the admin panel add mathjax to the list of active addons
-
-$a->config['system']['addon'] = [..., mathjax, ...]
-
-To select the source of the included javascript libraries add a line
-
-$a->config['mathjax']['baseurl'] = 'the URL to your MathJax installation';
-
-to your .htconfig.php file. If this line is not there, the addon assumes that
-you want to use the MathJax cloud (CDN).
-
-Please note that your usage of the CDN is governed by the "MathJax CDN Terms of
-Service" see http://www.mathjax.org/download/mathjax-cdn-terms-of-service/
-
-Author:  Tobias Diekershoff
-         http://diekershoff.homeunix.net/friendika/profile/tobias
-         email: tobias.diekershoff@gmx.net
-
diff --git a/mathjax/README.md b/mathjax/README.md
new file mode 100644
index 00000000..9647a986
--- /dev/null
+++ b/mathjax/README.md
@@ -0,0 +1,43 @@
+MathJax Addon
+=============
+
+* Author: Tobias Diekershoff
+* License: [3-clause BSD](http://opensource.org/licenses/BSD-3-Clause) license
+  (see the LICENSE file in the addon directory)
+
+About
+-----
+
+This addon for friendica includes the [MathJax][1] CDN to enable rendering of
+[LaTeX][2] formulae in your friendica postings.
+
+Configuration
+-------------
+All you need to do is provide friendica with the base URL of MathJax. This can
+be either the URL of the CDN of MathJax or your own installation.
+
+In case you want to use the CDN you can try the following URL as a quick start
+
+	http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML
+
+In case you don't want or can use the admin panel of firneidca you can activate
+the addon by adding _mathjax_ to the 
+
+	$a->config['system']['addon']
+
+list in your .htconfig.php file and then providing the base URL after that
+
+	 $a->config['mathjax']['baseurl'] = 'the URL to your MathJax installation';
+
+Usage
+=====
+
+Once the addon is configured you can use LaTeX syntax in your postings to share
+formulae with your contacts. But remember that the formulae are rendered in the
+browser of the user thus your contacts need to activate this addon as well. If
+they don't they will only see the LaTeX syntax in your texts.
+
+Just enclose your equations in $$...$$ pairs like e.g. $$f_c(x)=ax+b$$.
+
+[1]: http://www.mathjax.org/
+[2]: https://en.wikipedia.org/wiki/LaTeX
diff --git a/mathjax/mathjax.php b/mathjax/mathjax.php
index e57d69bf..ccc6ca0c 100644
--- a/mathjax/mathjax.php
+++ b/mathjax/mathjax.php
@@ -72,6 +72,7 @@ function mathjax_plugin_admin (&$a, &$o) {
 	}
 
 	$o = replace_macros( $t, array(
+		'$submit' => t('Submit'),
 		'$baseurl' => array('baseurl', t('MathJax Base URL'), get_config('mathjax','baseurl' ), t('The URL for the javascript file that should be included to use MathJax. Can be either the MathJax CDN or another installation of MathJax.')),
 	));
 }