Gangwei/new ui

[nuovonatura]

fixes #181
fixes #203
fixes #204
fixes #224
fixes #226
fixes #238
fixes #241
fixes #242

[codecov-io]

Codecov Report

Merging #271 (c522966) into master (4843600) will decrease coverage by 5.28%.
The diff coverage is 1.96%.

@@             Coverage Diff              @@
##             master     #271      +/-   ##
============================================
- Coverage     55.65%   50.37%   -5.29%     
  Complexity      713      713              
============================================
  Files           115      122       +7     
  Lines          2907     3216     +309     
  Branches        447      479      +32     
============================================
+ Hits           1618     1620       +2     
- Misses         1093     1400     +307     
  Partials        196      196              

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/seedu/address/MainApp.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../seedu/address/logic/commands/CalendarCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...eedu/address/logic/commands/ListLessonCommand.java	25.00% <0.00%> (ø)	1.00 <0.00> (ø)
.../java/seedu/address/logic/parser/PlanusParser.java	72.00% <0.00%> (-3.00%)	14.00 <0.00> (ø)
src/main/java/seedu/address/model/task/Task.java	88.88% <ø> (ø)	3.00 <0.00> (ø)
...va/seedu/address/model/task/deadline/Deadline.java	63.88% <0.00%> (-0.90%)	33.00 <0.00> (ø)
...ain/java/seedu/address/model/task/event/Event.java	50.74% <0.00%> (-0.77%)	23.00 <0.00> (ø)
src/main/java/seedu/address/ui/MainWindow.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...va/seedu/address/ui/card/CalendarDayEventCard.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
.../main/java/seedu/address/ui/card/DeadlineCard.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
... and 30 more

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[BobbyZhouZijian]

LGTM