Augmenting exported gradebook with custom columns

Now that one can insert and list all custom columns from a gradebook, the next step is to combine them with an exported gradebook with augument_gradebook.py Download augument_gradebook.py

. An example is:

./augument_gradebook.py 190 29_Dec_13-32_Grades-II2202.csv
'Thu Dec 29 15:13:25 2016'
'Thu Dec 29 15:13:25 2016'
'\n--DONE--\n\n'

This combines the columns from custom-column-entries-xxx-column-all.xlsx, where xxx is course_id; with the exported CSV file. Note that the merge uses an outer join so that it gets the union of the user_ids, in case some are only in one file or the other.