Add mention of proxy fork + other minor changes.

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 [[_TOC_]]
 
-Below we describe the processes to follow for any contribution to the FAµST
+Below we describe the processes to follow ideally for any contribution to the FAµST
 project.
 
 ### Posting issues on Gitlab
@@ -15,7 +15,7 @@ Please specify these elements on any issue which might need it:
   .rpm, .deb, .pkg).
 - The version of FAµST: check ``pyfaust.__version__`` on a Python terminal for
   pyfaust or ``matfaust.version()`` on a Matlab terminal for matfaust.
-- Explain clearly the problem you ran into or the feature you're intersting in
+- Explain clearly the problem you ran into or the feature you're interesting in
   and preferably give a snippet of code to reproduce easily.
 
 ### Code contribution
@@ -23,18 +23,20 @@ Please specify these elements on any issue which might need it:
 Any contribution to the development is of course welcome. It might be a bug
 fix, a feature or an algorithm implementation.
 
-In order to contribute:
+In order to contribute there are two alternatives:
 
-- If you have an Inria account or are a member for the FAµST gitlab project
-  please fork the project (a button is provided on the gitlab frontpage of the
-  project). Then do a Merge Request. If you are member of the project you might
-  also directly push your branch (giving a meaningful name) and do your merge
-  request for this branch.
+1. If you have an Inria account or are a member for the FAµST Gitlab project
+   please fork the project (a button is provided on the Gitlab frontpage of the
+   project). Then do a Merge Request. If you are member of the project you might
+   also directly push your branch (giving a meaningful name) and do your merge
+   request for this branch.
 
-- If you don't have have any account on Inria's gitlab you can clone the
+2. If you don't have have any account on Inria's Gitlab you can git-clone the
   project, do any modifications you want to do. Then send us the patch obtained
   with the command ``git diff > my.patch``. Please send to all email addresses
   listed in [contact section of the official web site](https://faust.inria.fr/contact/).
+  If you ask us we might fork the project for you and add your account as
+  project member so that you can proceed as in first alternative.
 
 Before sending us your patches or merge requests, please ensure as much as
 possible that the project is still able to build and that related tests pass