HRH data processing script cannot run nowadays

[BinglingICL]

Several issues are found:
(1) Dropbox file path is not working now; should replace the path with Imperial OneDrive repo.
(2) The auxiliary file "2018-03-09 Facility-level establishment MOH & CHAM" cannot be read now. Error message says the file may contains invalid xml.
(3) Some pandas functions like groupby, append, etc have changed or cannot use anymore.