Server implementation. (#90)

* Server implementation.

- Share the content of a folder as a magnet file.
- Web interface with all data needed for sharing data.
- New configuration to add several servers
- Every time the content of the server folder is changed, the magnet
file will be generated again.

Signed-off-by: Antonio Navarro Perez <antnavper@gmail.com>

* Update dependencies

Signed-off-by: Antonio Navarro Perez <antnavper@gmail.com>

* Use boltdb piece completion storage.

Signed-off-by: Antonio Navarro Perez <antnavper@gmail.com>

assets/js/servers.js

@@ -0,0 +1,54 @@
+Handlebars.registerHelper("to_date", function (timestamp) {
+    return new Date(timestamp * 1000).toLocaleString()
+});
+
+Distribyted.servers = {
+    _template: null,
+
+    _getTemplate: function () {
+        if (this._template != null) {
+            return this._template
+        }
+
+        const tTemplate = fetch('/assets/templates/servers.html')
+            .then((response) => {
+                if (response.ok) {
+                    return response.text();
+                } else {
+                    Distribyted.message.error('Error getting data from server. Response: ' + response.status);
+                }
+            })
+            .then((t) => {
+                return Handlebars.compile(t);
+            })
+            .catch(error => {
+                Distribyted.message.error('Error getting servers template: ' + error.message);
+            });
+
+        this._template = tTemplate;
+        return tTemplate;
+    },
+
+    _getRoutesJson: function () {
+        return fetch('/api/servers')
+            .then(function (response) {
+                if (response.ok) {
+                    return response.json();
+                } else {
+                    Distribyted.message.error('Error getting data from server. Response: ' + response.status)
+                }
+            })
+            .catch(function (error) {
+                Distribyted.message.error('Error getting status info: ' + error.message)
+            });
+    },
+
+    loadView: function () {
+        this._getTemplate()
+            .then(t =>
+                this._getRoutesJson().then(routes => {
+                    document.getElementById('template_target').innerHTML = t(routes);
+                })
+            );
+    }
+}