Add agency features

[adriaandotcom]

On request of a customer and data analytics we could provide these features:

• [ ] The ability to get page view data for all pages (i.e. more than 20) with a means of getting this into Excel (https://github.com/simpleanalytics/roadmap/issues/111)
• [x] For data to be exact and not rounded up (i.e. not 50K)
• [x] Campaign UTM data available (https://github.com/simpleanalytics/roadmap/issues/28, https://github.com/simpleanalytics/roadmap/issues/105)
• [x] The ability to cope with this volume of traffic - there could well be up over 3000-5000K concurrent users at busy times.
• [ ] Have multiple users with different roles (https://github.com/simpleanalytics/roadmap/issues/535)
• [ ] Aggregate/Bundle Domains for Summary Stats (https://github.com/simpleanalytics/roadmap/issues/548)

For exporting the data set export (with all pages and maybe utm params) we could also use something like node-xlsx-writestream or just our current implementation of CSV export.

Traffic wise our main server can handle it. It takes less then one second to do our current processing. For our queue server we probably need to move it to LeaseWeb as well. This is already planned because we move the others servers also out of Iceland.

Customer wants to go live mid March, so this needs to be done before March preferably.

Broker plan seems related (maybe they should have the same name): https://github.com/simpleanalytics/roadmap/issues/521

[adriaandotcom]

For data to be exact and not rounded up (i.e. not 50K)

I think we should create a website/account setting for this. Default should be rounded (with k) I think.

[adriaandotcom]

Keep this customer in the loop (see source)