ip addresses: add ip address show page.

* Add IP address show page at /ip_addresses/1.2.3.4.
* Add "Details", "Ban IP", "Ban User" options to the /ip_addresses listing.

app/views/ip_addresses/_info.html.erb

@@ -0,0 +1,75 @@
+<div class="ip-address-details">
+  <table class="aligned-vertical">
+    <tr>
+      <th>Location</th>
+      <td>
+        <% if ip_info.dig(:location, :city) %>
+          <%= ip_info.dig(:location, :city) %>,
+        <% end %>
+        <% if ip_info.dig(:location, :region, :name).present? %>
+          <%= ip_info.dig(:location, :region, :name) %>,
+        <% end %>
+        <%= ip_info.dig(:location, :country, :name) %>
+      </td>
+    </tr>
+    <tr>
+      <th>Network</th>
+      <td>
+        <%= link_to ip_info.dig(:connection, :route), ip_addresses_path(search: { ip_addr: ip_info.dig(:connection, :route) }) %>
+        (<%= link_to "info", "https://ipinfo.io/AS#{ip_info.dig(:connection, :asn)}/#{ip_info.dig(:connection, :route)}"  %>)
+      </td>
+    </tr>
+    <tr>
+      <th>Proxy</th>
+      <td><%= ip_address.lookup.is_proxy? ? "yes" : "no" %></td>
+    </tr>
+    <tr>
+      <th>IP Banned</th>
+      <td>
+        <% if IpBan.is_banned?(ip_address.ip_addr.to_s) %>
+          yes (<%= link_to "info", ip_bans_path(search: { ip_addr: ip_address.to_s }) %>)
+        <% else %>
+          no
+        <% end %>
+      </td>
+    </tr>
+    <tr>
+      <th>Type</th>
+      <td><%= ip_info.dig(:connection, :type) %></td>
+    </tr>
+    <tr>
+      <th>ASN</th>
+      <td>
+        <%= link_to "AS#{ip_info.dig(:connection, :asn)}", "https://ipinfo.io/AS#{ip_info.dig(:connection, :asn)}" %>
+      </td>
+    </tr>
+    <tr>
+      <th>Organization</th>
+      <td>
+        <%= ip_info.dig(:connection, :organization) %>
+      </td>
+    </tr>
+    <% if ip_info.dig(:carrier, :name).present? %>
+      <tr>
+        <th>Mobile Carrier</th>
+        <td><%= ip_info.dig(:carrier, :name) %></td>
+      </tr>
+    <% end %>
+    <tr>
+      <th>Website</th>
+      <td><%= external_link_to("http://#{ip_info.dig(:connection, :domain)}") %></td>
+    </tr>
+    <tr>
+      <th>Details</th>
+      <td>
+        <details>
+          <pre><%= JSON.pretty_generate(ip_info) %></pre>
+        </details>
+      </td>
+    </tr>
+  </table>
+</div>
+
+<div class="ip-address-map">
+  <%= embedded_google_map("#{ip_info.dig(:location, :latitude)},#{ip_info.dig(:location, :longitude)}", 300, 200) %>
+</div>