added agreement letter for thesis code and data usage

README.md

thesis_code_data_usage/README.md

thesis_code_data_usage/fhlogo.png

thesis_code_data_usage/hbrs_letter_structure_en.tex

thesis_code_data_usage/thesis_code_data_usage.aux

thesis_code_data_usage/thesis_code_data_usage.bbl

thesis_code_data_usage/thesis_code_data_usage.blg

thesis_code_data_usage/thesis_code_data_usage.log

thesis_code_data_usage/thesis_code_data_usage.pdf

thesis_code_data_usage/thesis_code_data_usage.synctex.gz

thesis_code_data_usage/thesis_code_data_usage.tex