Ahodges/documentation/doc158

@WatsonEmily please share with PMs who have worked through this process with data czars before... I'd love to get their feedback on level of detail and completeness.
@rocha and @stroilova , please let me know if this information is accurate (or designate others in Analytics).
@mhoeber and @srpearce , your feedback always welcome.

no, we cannot. The currently take almost a whole week to build, and if anything goes wrong, they have to start over from the beginning. So, saying something like "weekly data package" sets up an expectation that we cannot possibly meet.