changes for author_institutions - readers nd data_struct.py

80% done creating the mapping of authors: institutiions dictionary.
Revert "changes for author_institutions - readers nd data_struct.py"

This reverts commit 4f62e365922ce9260d8f757e70722473fe9791b3.
Revert 4f62e36..da3e935

This rolls back to commit 4f62e365922ce9260d8f757e70722473fe9791b3.
[57746740] test commit

to test if this is working.