Add Appointment Filter feature (Complete)

[kingsleykuan]

Adds Appointment Filter feature with add_appointment_filter and delete_appointment_filter commands.

Only merge after PR #158 is merged.

[codecov-io]

Codecov Report

Merging #165 (a91c167) into master (3dc6c8e) will decrease coverage by 1.80%.
The diff coverage is 34.44%.

@@             Coverage Diff              @@
##             master     #165      +/-   ##
============================================
- Coverage     47.30%   45.49%   -1.81%     
- Complexity      665      684      +19     
============================================
  Files           173      188      +15     
  Lines          3355     3853     +498     
  Branches        392      478      +86     
============================================
+ Hits           1587     1753     +166     
- Misses         1655     1957     +302     
- Partials        113      143      +30     

Impacted Files	Coverage Δ	Complexity Δ
...ds/filtercommands/AddAppointmentFilterCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...filtercommands/DeleteAppointmentFilterCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...seedu/address/logic/parser/TutorTrackerParser.java	37.50% <0.00%> (-1.98%)	11.00 <0.00> (ø)
...ilterparser/AddAppointmentFilterCommandParser.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...erparser/DeleteAppointmentFilterCommandParser.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
src/main/java/seedu/address/model/Model.java	100.00% <ø> (ø)	2.00 <0.00> (ø)
...java/seedu/address/model/filter/AddressFilter.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ddress/model/filter/AppointmentDateTimeFilter.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...n/java/seedu/address/model/filter/EmailFilter.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../java/seedu/address/model/filter/GenderFilter.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
... and 27 more

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[jared98lyj]

LGTM

[glatiuden]

LGTM