Implement oAuth Members API for Member data

GET api/v1/ccla/users

returns a collection of users (www members) that had signed CCLA

query string params
page
per_page
order (last_commit_date, fullname, first_name, last_name, id, created_date)
status (with_commits)
filter(first_name$(eq,like):freetext&last_name$(eq,like):freetext)
fields (id, gerrit_id, first_name, last_name, email, last_commit_date)

GET api/v1/ccla/users/(int:id)

returns an individual CCLA member

{
 "id" : 123,
 "first_name": "john",
 "last_name": "due",
 "email": "<email address hidden>",
 "gerrit_id": "XXXX",
 "last_commit_date" : "YYYY-MM-dd",
 affiliations : [
  {
   "org_name":"test org",
   "start_date":"",
   "end_date":"",
   "current":"true"
  }
  ....
 ]

}

GET api/v1/ccla/users/(int:id)/commits

returns a collection of commits given a ccla user

query string params
page
per_page
filter(created_date$eq,lt,gt):YYYY-MM-dd|project$(eq,like):free text)
order

GET api/v1/ccla/users/123/commits?page=1&per_page=10&filter=created_date$gt:2015-03-25|project$eq:openstack/nova&order=created_date

   {

        "total":20,
        "per_page":10,
        "current_page":1,
        "last_page":2,
        "from":1,
        "to":10,
        "data":[
          {
   "change_id":"",
   "project":"",
   "topic":"",
   "subject":"",
   "status":"",
   "created_date":"",
   "updated_date":"",
    },
   ....
  ]

    }