Keep track of user lift data.

[ZachStoltz]

CRUD for managing user-defined lift metrics.

• create new lift metric

• get lift metric by type

• get all user defined lift metrics

• update lift metric

• delete lift metric by type/id

• delete all lift metrics

JSON structure that seems sense atm:
/api/user/progression/:liftType

{
  "liftType": {
    "comments": "Comment goes here",
    "max": 200,
    "lastUpdated": "019-08-02T16:00:34.073Z",
    "previous": [{
      "max": 200,
      "lastUpdated": "019-08-02T16:00:34.073Z"
    },{
      "max": 200,
      "lastUpdated": "019-08-02T16:00:34.073Z"
    }]
  }
}