andela / Ah-backend-xmen / 679

97%

develop: 98%

Pull #34

travis-ci

feat(tagging): enable users to add tags to their articles

- add the tags field that will hold the tags from the users articles
- add a view method that retrieves all the tags of all the comments
- test the tag view that returns all the views
- fix the test errors in the test file
- refactor code to remove the comments and to clean its quality and change name of all_tags to tags

[Starts #162725267]

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