Alt names

This PR included a bunch of updates:

- change from esclient -> dbclient
- bump dependencies, notably upgrade pelias-suggester-pipeline
- fix alt_name issue as described in #10
- alpha3 filter, you can restrict the import to a single country FTW

resolves #10, improved alt names

```javascript
      {
        "_index": "pelias",
        "_type": "admin0",
        "_id": "7:adm0:ps:pse:_",
        "_score": 1,
        "_source": {
          "alpha3": "PSE",
          "admin0": "Palestine",
          "name": {
            "default": "Palestine",
            "alt1": "Gaza Strip"
          },
          "gn_id": null,
          "suggest": {
            "input": [
              "palestine",
              "gaza strip"
            ],
            "weight": 2,
            "output": "admin0:7:adm0:ps:pse:_"
          },
          "woe_id": 28289408,
          "center_point": {
            "lon": "34.392863",
            "lat": "31.407295"
          }
        }
      },
```