update botrex to support the new API to be glued into botrex (counters)

[vecna]

20133 ۞  ~/Dev/dashboard http https://facebook.tracking.exposed/api/v2/statistics/counter 
HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Connection: keep-alive
Content-Length: 557
Content-Type: application/json; charset=utf-8
Date: Sat, 20 Apr 2019 21:12:53 GMT
ETag: W/"22d-4El5UHxRJvPvDyDoWT3XUnzDF8I"
Server: nginx/1.10.3 (Ubuntu)
X-Powered-By: Express

{
    "cacheTimeSeconds": 120,
    "computedt": "2019-04-20T21:12:53.758Z",
    "content": {
        "accesses": 215052,
        "accesses_lw": 1024,
        "aggregated": 1817,
        "aggregated_lw": 125,
        "anomalies": 0,
        "anomalies_lw": 0,
        "errors": 45910,
        "errors_lw": 45910,
        "htmls": 9730023,
        "htmls_lw": 109908,
        "impressions": 15558097,
        "impressions_lw": 161475,
        "labels": 55326,
        "labels_lw": 55326,
        "metadata": 1665909,
        "metadata_lw": 81945,
        "semantics": 394695,
        "semantics_lw": 394695,
        "summary": 1141864,
        "summary_lw": 81880,
        "supporters": 3480,
        "supporters_lw": 20,
        "timelines": 1202891,
        "timelines_lw": 13237
    },
    "next": "2019-04-20T21:14:53.758Z"
}
20134 ۞  ~/Dev/dashboard 

This API returns the number of object in the collection and the one belonging to the last week (_lw)