Perform the big data modeling of ADVANCE and MONICA database

[davidonlaptop]

Use the ADVANCE & MONICA to ADAM mapping spreadsheet to create the avro file

Depends on #14.

[davidonlaptop]

Synced our bdg-formats (ADAM format) with upstream repo

[davidonlaptop]

We should create a branch "crchum" locally to commit our changes. Read the guidelines: https://github.com/GELOG/bdg-formats/blob/master/CONTRIBUTING.md