1.2.0 Release

[garrettjoecox]

This is intended to track the remaining tasks for 1.2.0 Anyone with access is free to edit this list.

Must have

• [ ] Changelog

Should have

• [ ] #778
• [ ] #790
• [ ] #115
• [ ] #475
• [x] #437

Nice to have

• [ ] #408
• [ ] #595
• [ ] #510

[LSeelig]

Would it be helpful to add #407? Especially #412.