Implement command history feature

[aureliony]

Closes #137

[codecov]

Codecov Report

Attention: Patch coverage is 32.83582% with 45 lines in your changes are missing coverage. Please review.

Project coverage is 77.74%. Comparing base (98bd7cc) to head (76c02be).

Files	Patch %	Lines
src/main/java/seedu/address/ui/MainWindow.java	0.00%	21 Missing ⚠️
src/main/java/seedu/address/ui/CommandBox.java	0.00%	19 Missing ⚠️
.../main/java/seedu/address/logic/CommandHistory.java	85.00%	0 Missing and 3 partials ⚠️
...rc/main/java/seedu/address/logic/LogicManager.java	60.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #162      +/-   ##
============================================
- Coverage     78.83%   77.74%   -1.10%     
- Complexity      509      518       +9     
============================================
  Files            73       75       +2     
  Lines          1545     1595      +50     
  Branches        136      143       +7     
============================================
+ Hits           1218     1240      +22     
- Misses          301      326      +25     
- Partials         26       29       +3     

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[bryanyee33]

LGTM, just a few suggestions.

[bryanyee33]

LGTM.