Adding alternative names for each stage

Author: spier

patterns/2-structured/governance-levels.md

@@ -69,14 +69,17 @@ Examples of common InnerSource operating models (1) are:
 - **Bug Reports and Issues Welcome**:
     - People outside the core development team may use the code.
     - They can submit feature requests and bug reports for things they would like to see changed.
+    - aka **Readable Source**, **Shared Source**
 - **Contributions Welcome**:
     - People outside the core development team may use the code.
     - They can also make modifications and submit them to core team for inclusion.
-- **Shared Ownership** (sometimes called **Distributed Ownership**):
+    - aka **Guest Contributions**
+- **Shared Ownership**:
     - Members of different teams collaborate on the project as equal peers.
     - Everyone has the ability to merge code.
     - Everyone has an equal say on the project direction.
     - Everyone has an equal say in who else to add to this group.
+    - aka **Distributed Ownership**, **Maintainers in Multiple Team**
 
 Examples of promoting the model names (3) are: