USDA database csv import [Main task]

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#387

Data will be posted here: https://github.com/ChickenKyiv/awesome-food-db-strucutures/tree/master/USDA-01-06-2019

1) connect our sd logic with this DB. Use generator script and have a separated method, that will use our code and help to convert csv. So we'll have a pretty similar result to FoodComposition project.

stage 0 - nothing working well. initial preparations
stage 1 - data can be parsed and connected with sd module
stage 2 - we have a separated place for created files. as dump is huge - we'll need to have a files.
stage 3 - export data from this module
stage 4 - module release
stage 5 - test coverage, simple version
stage 6 - bind to server or ... debatable

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