Merge server#7

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tawnyzhao wants to merge 35 commits intomasterfrom

Commits on Nov 5, 2019

Changes prior to demo
OustanDing
committed

Commits on Nov 24, 2019

Added list of times
OustanDing
committed

Commits on Nov 26, 2019

Fixed some app.py, working on changes to implement module class
OustanDing
committed
Made modifications to app.py in accordance with module.py changes
OustanDing
committed

Commits on Nov 27, 2019

push
Jonathancui123
committed

Commits on Nov 28, 2019