Clarifying legal and technical considerations

Author: jponge

CONTRIBUTING.md

@@ -2,6 +2,19 @@
 
 Thank you for your interest in Golo!
 
+## Legal considerations
+
+If you are adding or modifying files you may add your own copyright line, but please ensure that the
+form is consistent with the existing files, and please note that a INSA-Lyon copyright line must
+appear in every copyright notice. All files are released under the terms of the *Apache Software
+License, Version 2.0*.
+
+Last but not least, you need to sign a
+[contributor license agreement](http://golo-lang.org/legal/cla/)
+before your contribution can be accepted into the project.
+
+## Technical considerations
+
 You can propose contributions by forking the GitHub reference repository and sending pull requests.
 Do not make pull requests from your `master` branch, please use topic branches instead.
 
@@ -14,12 +27,4 @@ http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
 A contribution is not a good contribution unless it comes with unit tests, integration tests and
 documentation.
 
-If you are adding or modifying files you may add your own copyright line, but please ensure that the
-form is consistent with the existing files, and please note that a INSA-Lyon copyright line must
-appear in every copyright notice. All files are released under the terms of the *Apache Software
-License, Version 2.0*.
-
-Last but not least, you need to sign a
-[contributor license agreement](http://golo-lang.org/legal/cla/)
-before your contribution can be accepted into the project.