Support for `DebuggerDisplay` attribute

[SergeyTeplyakov]

Warn if the method is not presented or could not be found, or return value is not string etc.

[KirillOsenkov]

I wish we had this! See here:
dotnet/msbuild#610

It shouldn't be hard to verify that the names inside { } bind successfully.

[SergeyTeplyakov]

Yep, implementation is not that hard. Will do it soon!

[SergeyTeplyakov]

Implemented this analysis. More information could be found at https://github.com/SergeyTeplyakov/ErrorProne.NET/wiki/DebuggerDisplayAttribute-analyzer