Add contribution section to readme

README.md

@@ -114,15 +114,18 @@ Output:
     Found URL: [HTTPS://FOO.COM/x?b#c=tab1]
     Found URL: [http://cesanta.com]
 
+# Contributions
+
+People who have agreed to the
+[Cesanta CLA](http://cesanta.com/contributors_la.html)
+can make contributions. Note that the CLA isn't a copyright
+_assigment_ but rather a copyright _license_.
+You retain the copyright on your contributions.
+
 # License
 
 SLRE is released under
 [GNU GPL v.2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html).
 Businesses have an option to get non-restrictive, royalty-free commercial
-license and professional support from
-[Cesanta Software](http://cesanta.com).
+license and professional support from [Cesanta](http://cesanta.com).
 
-[Super Light DNS Resolver](https://github.com/cesanta/sldr),
-[Mongoose web server](https://github.com/cesanta/mongoose)
-are other projects by Cesanta Software, developed with the same philosophy
-of functionality and simplicity.