Release of version 0.7.2. 

Release of version 0.7.1. 

Release of version 0.7.0. 

Release of version 0.6.7. 

Release of version 0.6.6. 

Release of version 0.6.5. 

Release of version 0.6.4. 

Release of version 0.6.3. 

Release of version 0.6.2. 

Release of version 0.6.1.