Champion "tuples" (C# 7.0, VB 15.0)

- [ ] Proposal added
- [x] Discussed in LDM ([2016-07-12](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-07-12.md) [2016-07-13](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-07-13.md) [2016-09-06](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-09-06.md) [2016-10-18](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-10-18.md) [2016-10-25](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-10-25-26.md) [2016-11-15](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-11-15.md) [2016-11-30](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-11-30.md) [2016-12-07](https://github.com/dotnet/csharplang/blob/master/meetings/2016/LDM-2016-12-07-14.md) [2017-01-10](https://github.com/dotnet/csharplang/blob/master/meetings/2017/LDM-2017-01-10.md) [2017-01-17](https://github.com/dotnet/csharplang/blob/master/meetings/2017/LDM-2017-01-17.md))
- [x] Decision in LDM
- [x] Finalized (done, rejected, inactive)
- [ ] Spec'ed

See also

- https://github.com/dotnet/roslyn/issues/347
- http://mustoverride.com/tuples_structs/
- http://mustoverride.com/tuples_valuetuple/
- http://mustoverride.com/tuples_names/
- http://mustoverride.com/tuples_conversions/