Replaced old jade with new pug.

Using temporarily npm-shrinkwrap since `template-html-loader` uses an old `consolidate.js` version which doesn't support `pug`.
Follow here: https://github.com/jtangelder/template-html-loader/issues/8

res/app/settings/general/language/language.pug

@@ -0,0 +1,8 @@
+.widget-container.fluid-height(ng-controller='LanguageCtrl')
+  .heading
+    i.fa.fa-flag
+    span(translate) Language
+  .widget-content.padded
+    .form-horizontal
+      .form-group
+        select.form-control(ng-model='language', ng-options='key as value for (key, value) in supportedLanguages')