1. Upgrading from version 2.1 to 2.1.1
2. Upgrading from version 2.0 and 2.0.1 to 2.1
3. Upgrading from version 2.0-beta to 2.0
4. Upgrading from version 1.7.1 to 2.0
5. Upgrading from version 1.7.0 to 1.7.1
6. Upgrading from version 1.6.1 to 1.7.0
7. Upgrading from version 1.6.0 to 1.6.1
8. Upgrading from version 1.5.5 to 1.6.0
9. Upgrading from version 1.5.4 to 1.5.5
10. Upgrading from version 1.5.3 to 1.5.4
11. Upgrading from version 1.5.2 to 1.5.3
12. Upgrading from version 1.5.1 to 1.5.2
13. Upgrading from version 1.5 to 1.5.1
14. Upgrading from version 1.4 to 1.5
15. Upgrading from version 1.3.1 to 1.4
16. Upgrading from version 1.3 to 1.3.1
17. Upgrading from version 1.2.2 to 1.3
18. Upgrading from version 1.2.1 to 1.2.2
19. Upgrading from version 1.2 to 1.2.1
20. Upgrading from version 1.1 to 1.2