Adding Git procedures

README.md

@@ -10,7 +10,6 @@ Create folder path and initialize the workspace:
 $ mkdir -p ~/idress_ws/src
 $ cd ~/idress_ws/src
 $ catkin_init_workspace
-
 ```
 
 Compile it: 
@@ -34,4 +33,20 @@ $ cd ~/idress_ws/src
 $ wstool merge http://www.iri.upc.edu/people/sfoix/idress-minimal.rosinstall
 $ wstool update
 ```
+This will make your src folder to look like this:
+```bash
+  idress_common_msgs
+  idress_force_perception
+  idress_reactive_security
+  idress_speech_perception
+  idress_user_perception
+```
+
+Each package belongs to a separate Git repository. By default, there are two branches within each of the repositories: one called *master* and another one called *mock*. Both branches are protected and maintained by IRI (If necessary, this can be changed). The *master* branch is the one used for stable code. The *mock* branch should be used for allowing the developers to carry out mock tests.
+
+Developers should not push any code to these two repositories but develop into branches or forks based on them. Once the code is sufficiently tested, a merge to the stable branch can be requested.
+
+For those that are not familiar with GIT repositories, please have a look to [git - the simple guide] (http://rogerdudler.github.io/git-guide/) and [Pro - Git book] (http://book.git-scm.com/)
+
+