Update open_source_licence.md

Changed the title and added content.
In current form this document puzzles users: why, what, what for is this published in the documentation site. Publishing simply ember.js license gives no understanding and on top of that what piece of software the licensing applies to in the Cloud environment.

Author: michal-at-travisci

user/open_source_licence.md

@@ -1,9 +1,15 @@
 ---
-title: EmberJS MIT License 
+title: Licensing information
 layout: en
 
 ---
 
+Travis CI relies on multiple Open Source modules and frameworks. The respective licensing information is available in Travis CI [public repositories](https://github.com/travis-ci). Travis CI public source code is usually licensed with MIT License.
+
+The Travis CI [web application](https://app.travis-ci.com), running in your browsers (which may satisfy 'distributing Software' according to legal assesment), relies on EmberJS framework. Particular EmberJS framework version used by Travis CI is licensed as follows:
+
+# EmberJS MIT License
+
 Copyright (c) 2011 Yehuda Katz, Tom Dale, and Ember.js contributors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies