[new_dataset] SCF_plus_mini_no_weights

[shlff]

As discussed with @jstac and @maanasee this PR produces a dataset called SCF_plus_mini_no_weights.csv along with its generating file generating_mini.md.

[shlff]

Hi @maanasee, now you can use the following code to access the dataset temporarily:

import pandas as pd

pd.read_csv('https://media.githubusercontent.com/media/QuantEcon/high_dim_data/update_scf_noweights/SCF_plus/SCF_plus_mini_no_weights.csv')

After merging this PR I will update you with the corresponding new URL path so that you can use it in your lecture.

Please feel free to let me know by email or zoom if you need any assistance or collaboration, @maanasee. I am available for helping over the weekend.

[shlff]

Hi @mmcky or @hengcheng would any of you have time to review this PR? Much appreciated.

Looking forward to your comments.

[mmcky]

@shlff perhaps it is best to merge #3 so you can also populate the README when you add new datasets