Create a new set of lables for project.

[hubuk]

What do you think about creating a new sot of labels for CC? Current one does not look consistent.
Newly created set may be similar to the one defined for NuGet.

[sharwell]

I've been using this set of labels for the StyleCopAnalyzers project. This project will certainly require a few unique labels as well:

• Missing reference contracts
• Erroneous reference contracts

[sharwell]

@SergeyTeplyakov I think this can be closed. The labels are likely to evolve over time, but this is a start.