Create c-tag-find/c-today/c-tomorrow feature

[yanbingtao]

1. c-today:

• Able to list down all persons whose tag(s) match today's day (i.e. Monday, Tuesday, etc).

2. c-tomorrow:

• Able to list down all persons whose tag(s) match the next day's day (i.e. Monday, Tuesday, etc).

3. c-tag-find KEYWORD [KEYWORDS] ...

• Able to list down all persons whose tag(s) match the keyword(s) entered by the user.

[codecov-io]

Codecov Report

Merging #141 into master will decrease coverage by 2.10%.
The diff coverage is 7.07%.

@@             Coverage Diff              @@
##             master     #141      +/-   ##
============================================
- Coverage     63.57%   61.46%   -2.11%     
  Complexity      665      665              
============================================
  Files           119      124       +5     
  Lines          2380     2473      +93     
  Branches        287      294       +7     
============================================
+ Hits           1513     1520       +7     
- Misses          755      841      +86     
  Partials        112      112              

Impacted Files	Coverage Δ	Complexity Δ
...main/java/seedu/address/commons/core/Messages.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...seedu/address/logic/commands/FindByTagCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../address/logic/commands/FindByTagTodayCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...dress/logic/commands/FindByTagTomorrowCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../seedu/address/logic/parser/AddressBookParser.java	61.76% <0.00%> (-5.98%)	17.00 <0.00> (ø)
...edu/address/logic/parser/TagFindCommandParser.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ess/model/person/TagContainsKeywordsPredicate.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../java/seedu/address/model/util/SampleDataUtil.java	12.00% <0.00%> (ø)	1.00 <0.00> (ø)
src/main/java/seedu/address/model/Model.java	55.00% <50.00%> (-11.67%)	4.00 <0.00> (ø)
... and 4 more

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[ureshiiYing]

Other comments: Perhaps naming the commands as TodayCommand and TomorrowCommand isn't the best? It felt vague to me. The missing javadoc descriptions did not help too.

[yanbingtao]

Other comments: Perhaps naming the commands as TodayCommand and TomorrowCommand isn't the best? It felt vague to me. The missing javadoc descriptions did not help too.

I've changed these two to FindByTagTodayCommand.java and FindByTagTomorrowCommand.java. And two Javadoc were also added for these two classes to better explain the meaning. Thanks!

[Diwu-Yi]

LGTM

[Diwu-Yi]

LGTM

[Persdre]

LGTM