Add profile picture

[afroneth]

Add profile picture functionality.

For #19

[codecov-commenter]

Codecov Report

Merging #61 into master will decrease coverage by 2.76%.
The diff coverage is 42.96%.

@@             Coverage Diff              @@
##             master      #61      +/-   ##
============================================
- Coverage     72.18%   69.42%   -2.77%     
- Complexity      410      427      +17     
============================================
  Files            73       77       +4     
  Lines          1251     1380     +129     
  Branches        125      137      +12     
============================================
+ Hits            903      958      +55     
- Misses          313      380      +67     
- Partials         35       42       +7     

Impacted Files	Coverage Δ	Complexity Δ
...main/java/seedu/address/commons/core/Messages.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...ava/seedu/address/logic/parser/CliniCalParser.java	85.00% <0.00%> (+0.78%)	13.00 <0.00> (+1.00)
.../java/seedu/address/model/util/SampleDataUtil.java	18.75% <0.00%> (-1.25%)	1.00 <0.00> (ø)
...ain/java/seedu/address/storage/StorageManager.java	58.62% <0.00%> (-35.83%)	9.00 <0.00> (ø)
src/main/java/seedu/address/ui/MainWindow.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
src/main/java/seedu/address/ui/PatientCard.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...c/main/java/seedu/address/ui/PatientListPanel.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...rc/main/java/seedu/address/logic/LogicManager.java	57.89% <38.88%> (-17.11%)	4.00 <1.00> (+1.00)	⬇️
...dress/logic/commands/AddProfilePictureCommand.java	41.66% <41.66%> (ø)	3.00 <3.00> (?)
...va/seedu/address/model/patient/ProfilePicture.java	60.00% <60.00%> (ø)	4.00 <4.00> (?)
... and 11 more

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[ktaekwon000]

LGTM, thanks for the work!