Translations and i18n (#60)

* Managing i18n

* Fix absolute path

* Config files

* Home link manage langage

* Fixing footer i18n

* Implemented i18n on newsletter

* Implemented two languages in example

* Removed old section directory

* Using yaml in data to organize home summary

* Fully working for old versions without i18n

* Integrating language menu CSS

* Fix language dropdown CSS

* Refactor translation codes

* Remove duplicate code

* Fix URL issues

* Move customMenus and other site related config into data section

* Fix error during language toggle

* Only show the available translation for the posts

* Handle navbar brand URL properly

* Fix responsiveness

Co-authored-by: Hugo MARTIN <hugo.martin.69@gmail.com>
Co-authored-by: hossainemruz <emruz@appscode.com>

layouts/partials/cards/post.html

@@ -1,5 +1,5 @@
 <div class="post-card">
-  <a href="{{ .RelPermalink }}" class="post-card-link">
+  <a href="{{ .RelPermalink | relLangURL }}" class="post-card-link">
     <div class="card">
       <div class="card-head">
         <img class="card-img-top" src='{{ partial "helpers/get-hero.html" . }}'/>
@@ -11,7 +11,7 @@
       <div class="card-footer">
         <span class="float-left">{{ .Date.Format "January 2, 2006" }}</span>
         <a
-        href="{{ .RelPermalink }}"
+        href="{{ .RelPermalink | relLangURL }}"
         class="float-right btn btn-outline-info btn-sm"
         >Read</a
         >