updated for fabacademy 2019

docs/about/agreement.md

docs/about/index.md

docs/assignments/week01.md

docs/assignments/week02.md

docs/assignments/week03.md

docs/assignments/week04.md

docs/assignments/week05.md

docs/assignments/week06.md

docs/assignments/week07.md

docs/assignments/week08.md

docs/assignments/week09.md

docs/assignments/week10.md

docs/assignments/week11.md

docs/assignments/week12.md

docs/assignments/week13.md

docs/assignments/week14.md

docs/assignments/week15.md

docs/assignments/week16.md

docs/assignments/week17.md

docs/assignments/week18.md