[Please Do Not Merge]Chen Yuheng: Tutorial adding command#12

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AY2021S2-CS2103-T16-2:masterfrom

skinnychenpi:tutorial-adding-command

Commits on Feb 24, 2021

Now the UI can see the remark.(Before modify a person to support remark field)
skinnychenpi
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finish update other usages of Person
skinnychenpi
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Commits on Feb 25, 2021