Update CONTRIBUTING.md

Author: miesgre

CONTRIBUTING.md

@@ -24,4 +24,24 @@ you can make a pull-request to the `develop` branch.
 If you are fixing a bug in a `release` version, you need to branch of `release/<version>`.
 Once the bug is fixed, you can make a pull-request to the `release<version>` branch.
 
+### Making a new feature
+
+You have to create a new branch from `develop`
+
+```
+$git checkout develop
+$git checkout -b feature/my-new-feature
+```
+
+When your new feature is finished, edit the `CHANGELOG` file and add a line explaining your new feature.
+Then make a pull-request to de `develop` branch.
+
+
+## Syntax
+
+Before making a pull request, ensure that syntax style is correct. You can check this by running the line:
+
+```
+grunt checksyntax
+```