Add new flag for viewloan and merge viewloans into viewloan

[narwhalsilent]

Fix #90. Refer to the issue page for more information.

[codecov]

Codecov Report

Attention: Patch coverage is 4.34783% with 22 lines in your changes are missing coverage. Please review.

Project coverage is 53.36%. Comparing base (939ccb9) to head (fb7601f).
Report is 2 commits behind head on master.

Files	Patch %	Lines
...du/address/logic/parser/ViewLoanCommandParser.java	0.00%	10 Missing ⚠️
...seedu/address/logic/commands/ViewLoansCommand.java	0.00%	5 Missing ⚠️
.../seedu/address/logic/commands/ViewLoanCommand.java	0.00%	4 Missing ⚠️
...address/logic/commands/ViewLoanRelatedCommand.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #91      +/-   ##
============================================
- Coverage     53.86%   53.36%   -0.51%     
  Complexity      429      429              
============================================
  Files            92       93       +1     
  Lines          1927     1947      +20     
  Branches        183      191       +8     
============================================
+ Hits           1038     1039       +1     
- Misses          847      866      +19     
  Partials         42       42              

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[marcus-ny]

Just minor nit with access modifier.

Have tested the command and works without any errors. Seems gtg!

[marcus-ny]

nit: might be better to use explicit access modifier

[marcus-ny]

Changes lgtm!