Final iteration of NUSocials

Features:

Person

Fix issues by @fredtwt in #142
Test cases by @ongkimlai in #156
Branch testcase by @fredtwt in #157
Test cases done for event field types by @fredtwt in #158
Test cases for JsonAdaptedName by @ongkimlai in #159
Update DG with removetag UML diagrams by @ongkimlai in #160
Branch testcase by @fredtwt in #161
Enlarge RemoveTagSequenceDiagram by @ongkimlai in #162
Separate RemoveTagSequenceDiagram into parse and execute by @ongkimlai in #163
Separate DeleteMultipleSequenceDiagram into parse and execute by @ongkimlai in #164
Fix error in DeleteMultipleSequenceDiagram by @ongkimlai in #165
Change sequence diagram for Tag, Event & CancelEvent by @fredtwt in #167
Add return arrow from LogicManager in various Sequence Diagram by @ongkimlai in #168
Update DG by @fredtwt in #169
Fix EditCommandTest and EditCommandParserTest by @ongkimlai in #170
Add manual testing instructions by @fredtwt in #171
Find uml diagram by @viki0526 in #166
Add documentation by @manu2002g in #172
Update fredtwt.md by @fredtwt in #173
Update DG UG and PPP by @ongkimlai in #174
Add page breaks to UG and DG by @ongkimlai in #175
Add Test code + Update PPP by @manu2002g in #176
Add more page breaks for DG formatting by @ongkimlai in #177
Update PPP and add DG page breaks by @ongkimlai in #178
Add PRs hyperlinks to fredtwt.md by @fredtwt in #179
Update DG by @fredtwt in #180
Update fredtwt.md by @fredtwt in #181

Full Changelog: v1.3.2...v1.4