Add GPS location plugin

coreplugins/gpslocation/__init__.py

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+from .plugin import *

coreplugins/gpslocation/manifest.json

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+{
+	"name": "GPS Location",
+	"webodmMinVersion": "0.5.0",
+	"description": "Add a GPS location button to the 2D map view",
+	"version": "1.0.0",
+	"author": "Piero Toffanin",
+	"email": "[email protected]",
+	"repository": "https://github.com/OpenDroneMap/WebODM",
+	"tags": ["gps", "location"],
+	"homepage": "https://github.com/OpenDroneMap/WebODM",
+	"experimental": false,
+	"deprecated": false
+}

coreplugins/gpslocation/plugin.py

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+from app.plugins import PluginBase
+
+class Plugin(PluginBase):
+    def include_js_files(self):
+        return ['main.js']

coreplugins/gpslocation/public/main.js

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+PluginsAPI.Map.willAddControls([
+    	'gpslocation/node_modules/leaflet.locatecontrol/dist/L.Control.Locate.min.js',
+    	'gpslocation/node_modules/leaflet.locatecontrol/dist/L.Control.Locate.min.css'
+	], function(args, _){
+
+    // TODO: how to specify consistent plugin render ordering?
+    // we use a timeout to make sure this button is rendered last
+    // but a better method is warranted
+    setTimeout(function(){
+        L.control.locate({
+            position: 'bottomleft',
+            showPopup: false,
+            locateOptions: {
+                enableHighAccuracy: true
+            },
+            strings: {
+                title: "Show My Location"
+            }
+        }).addTo(args.map);
+    }, 150);
+});

coreplugins/gpslocation/public/package.json

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+{
+  "name": "gpslocation",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "leaflet.locatecontrol": "^0.81.1"
+  }
+}