Pass common dependencies to core plugins

[skipor]

Pass core.Deps struct to Aggregator, Provider and Gun as an arg to their Run (Bind) methods.

What put to core.Deps:
1). zap.Logger
2) some metrics registry. I think something custom based on go-metrics
3) registry, to register what will be logged as every second shooting status
4) afero.Fs? Not shure really.
Document, that some fields may be added in future versions.