Leverage eVar's in Real-Time Reports

With the push to remove complexity out of tagging, reporting and analysis I would like to see eVar support inside of the real time reports and API.

For those of us that want to use the realtime reports we are forced to leverage props. But we do not want to use both props and evars for the same data (too confusing for end users!).

I propose that the support for evars works exactly how the prop support works. Whatever data is on the hit should be available in real-time and we leave persistence of data to reporting and analysis workspace.