Feature: allow to add an appName and a namespace for report

[armand1m]

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[armand1m]

@JackTheRipper could you help me describing this one when you have time? :P

Yeah - we need to make sure that we can track of the environment (dev - stg or production) - I don't know if we can only rely on the URL.

For the appId, I was thinking about a use case like Frint or a market place with different widgets. We record globally on the window, so it would be cool to also record events and so on per widget.