Added Tag & UserTags model

[Mir-SA]

Refer #9

Description

• Adds tag & usertag model
• Removes older skills model & skills property from user model

[vinayak-trivedi]

can this be an array, because there can be multiple tags?

[Mir-SA]

i'm thinking of storing it as "react": ""

[vinayak-trivedi]

why we would store empty strings inside the key?

[Mir-SA]

it can be 1 of 2 ways.

• create series of tags(tag1, tag2) as key & store values in it
  • with this approach we'll need key(tag1..) to get the id
  • we will have to store this key on tag model
• store value as key with empty string
  • with this approach we can fetch document and get all keys(tagid) off the object

[Mir-SA]

we will take approach as it was discussed in call to create a new doc for every user tag along with their id
e.g.

doc1: {
    userid: user123,
    tagid: fdhjewuih3
},
doc2: {
    userid: user123,
    tagid: fdwjk2
}

[vinayak-trivedi]

LGTM