Adds Google Analytics. Closes #350

app/lang/en/forms.php

@@ -61,6 +61,7 @@ return [
             'days-of-incidents' => 'How many days of incidents to show?',
             'banner'            => 'Banner Image',
             'banner-help'       => "It's recommended that you upload files no bigger than 930px wide .",
+            'google-analytics'  => "Google Analytics code",
         ],
         'security' => [
             'allowed-domains'      => 'Allowed domains',

app/lang/fr/forms.php

@@ -61,6 +61,7 @@ return [
             'days-of-incidents' => 'Nombre de jours à afficher ?',
             'banner'            => 'Bannière',
             'banner-help'       => "Il est recommandé de télécharger des fichiers de moins de 930 pixels de large.",
+            'google-analytics'  => "Google Analytics code",
         ],
         'security' => [
             'allowed-domains'      => 'Domaines autorisés. <small class="help-block"></small>',

app/lang/pt-BR/forms.php

@@ -60,6 +60,7 @@ return [
             'days-of-incidents' => 'Quantos dias de incidentes para mostrar?',
             'banner'            => 'Imagem do banner',
             'banner-help'       => "É recomendável que você fazer upload de arquivos menores que 930px.",
+            'google-analytics'  => "Google Analytics code",
         ],
         'security' => [
             'allowed-domains'      => 'Domínios permitidos',