Milestone tasks (Oct 25th)

[jinglinpeng]

EDA

@devinllu :

• density parameter in plot_diff (Allow density histograms when using plot_diff #683 )
• overview section in create_diff_report (EDA: Report of Comparing Dataframs (create_diff_report) #702 )

@Waterpine:

• imdt save to JSON (Add abillity to export the report in JSON #681 )
• (Optional) fix eda: missing value not show in report in some cases #711 ,eda: full na column is not correct in report  #712

@jinglinpeng :

• fix eda: unreachable error for string type #713 , typo mistake #707
• Release DataPrep 0.3.1

@sahmad11

• draft the blog post

ConnectorX

• Integrate into dataprep

Clean

• New clean functions
• New documentation of clean functions
• Initial version of GUI