tag models done

[Manit1]

Fixes #19

[abhishek97]

@Manit1

• Saving Tags on questions doesn't work.
• We don't allow deleting tags

[Manit1]

Hey @abhishek97,
I fixed the issue with saving tags on questions and removed the delete route but still not able to figure how can I implement filtering with tags.

Basically I need to do something like

DB.questions.findOne({
    where: {
        id: 1,
    },
    include: {
        model: DB.tags,
        where: {
            name: {
                $iLike: '%something%'
            }
        },
        required: false
    }
}).then(o => console.log(o.tags))

to filter this but not able to think of how to integrate this in base controller