Add roll up guide

[brosenberg42]

Issues:

• Add Roll Up support to Workflow Manager openmpf#1739

Related PRs:

• Feat/rollup openmpf#1749

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This change is 

[jrobble]

Reviewed 34 of 34 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @brosenberg42)

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docs/docs/Roll-Up-Guide.md line 6 at r1 (raw file):

# Roll Up Overview

I pushed a jrobble/document-rollup branch. Please take a look and considering merging the changes into this one.

Among other things, I provided an example of roll up in the Overview section for clarity. Also, I moved the example JSON above the field definitions to give the reader more context up front. Additionally, I provided a "COLOR" example to give a second realistic use case.

[brosenberg42]

Reviewable status: 29 of 34 files reviewed, 1 unresolved discussion (waiting on @jrobble)

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docs/docs/Roll-Up-Guide.md line 6 at r1 (raw file):

Previously, jrobble (Jeff Robble) wrote…

I pushed a jrobble/document-rollup branch. Please take a look and considering merging the changes into this one.

Among other things, I provided an example of roll up in the Overview section for clarity. Also, I moved the example JSON above the field definitions to give the reader more context up front. Additionally, I provided a "COLOR" example to give a second realistic use case.

Done.

[jrobble]

Reviewed 5 of 5 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @brosenberg42)