Random/regular sampling annotations

[mzur]

Implement an annotation mode that allows random/regular sampling. As we don't have a concept of annotations without labels we can't generate the random annotations and then let the user label them. Instead, we can generate random locations (in the client side JS app) and have the user jump from location to location. The user selects a label for the current location which will create a new point annotation with the label attached.

There was still some controversy with Daniel about this feature so I won't give it any priority right now. But we agree that we ultimately want to have something like this in Biigle.

[tschoeni]

I would give this higher priority, not because many need it but because this "CPCe" annotation style is often mentioned in publications and could serve as a simple "selling argument" for B2.0.

[mzur]

We discussed this again and agreed that random sampling should be always superior to regular sampling (keyword: sampling theorem). So we won't offer regular sampling at all.

Continued here.