Expand `stations` endpoint to find stations

Add a new parameter to https://www.edsm.net/api-system-v1/stations so it can return a list of stations with that name on each system.

It would help to be able to find not just stations by name, also moving megaships like The Gnosis or the AEGIS ones, Acropolis and Vanguard.

Something like this: https://www.edsm.net/api-system-v1/stations?stationName=Abasheli Dock

[
    {
        "id": 53165,
        "marketId": 3227548928,
        "type": "Outpost",
        "name": "Abasheli Dock",
        "distanceToArrival": 2151.051025,
        "allegiance": "Federation",
        "government": "Corporate",
        "economy": "Extraction",
        "secondEconomy": null,
        "haveMarket": true,
        "haveShipyard": false,
        "haveOutfitting": true,
        "otherServices": [
            "Refuel",
            "Repair",
            "Contacts",
            "Universal Cartographics",
            "Missions",
            "Crew Lounge",
            "Tuning",
            "Search and Rescue"
        ],
        "controllingFaction": {
            "id": 23193,
            "name": "Gold Allied Solutions"
        },
        "updateTime": {
            "information": "2017-11-06 16:08:14",
            "market": "2017-10-30 13:09:33",
            "shipyard": null,
            "outfitting": "2017-10-30 13:09:33"
        }
    },
    {
        "id": 43353,
        "marketId": 3227778816,
        "type": "Outpost",
        "name": "Abasheli Dock",
        "distanceToArrival": 13.067385,
        "allegiance": "Independent",
        "government": "Corporate",
        "economy": "Industrial",
        "secondEconomy": "Extraction",
        "haveMarket": false,
        "haveShipyard": false,
        "haveOutfitting": false,
        "otherServices": [
            "Restock",
            "Refuel",
            "Repair",
            "Contacts",
            "Universal Cartographics",
            "Missions",
            "Search and Rescue"
        ],
        "controllingFaction": {
            "id": 57874,
            "name": "Baroju Legal Holdings"
        },
        "updateTime": {
            "information": "2018-09-04 14:32:00",
            "market": null,
            "shipyard": null,
            "outfitting": null
        }
    }
]

EDSM-NET / FrontEnd

Expand `stations` endpoint to find stations #200