#6 - Adding Zenhub dependencie in how to contribute section

Signed-off-by: bumbleblo <bumbleblo2013@gmail.com>

CONTRIBUTING.md

@@ -2,11 +2,15 @@
 
 1. Purpose of the project
 2. How to contribute
+ * How use issues
+ * Creating your branches
+ * Proposing changes
 
+## Purpose of the project
 
 ## How to contribute
 
-If you want to contribute with that project the first stage is create a issue in github, that issue will be linked with your branch as defined in [How propose your changes]().
+If you want to contribute with that project the first stage is create a issue in github, that issue will be linked with your branch as defined in [How propose your changes](). All issues is handled using [Zenhub](https://www.zenhub.com/).
 
 #### How use issues
 
@@ -18,11 +22,13 @@ The first pass to create your branch is define a name, the pattern followed in o
 "<issue number>-<first-name>-<second name separated with - >"
 ```
 
+All branches will be created from devel branch.
+
 When you are creating branches stay tuned in:
 
 * The language used in the project is English
 * A branch is always linked with a issue
 * Commit just files related with your commit and issue
 
 
-#### How propose your changes
+#### Proposing changes