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>

exampleSite/data/bn/site.yaml

@@ -0,0 +1,11 @@
+# Copyright Notice
+copyright: © 2020 Copyright.
+
+# Meta description for your site.  This will help the search engines to find your site.
+description: Portfolio and personal blog of Jane Doe.
+
+# specify the list of custom menus that you want to show in the top navbar.
+# they will be separated by a divider from the main menus.
+customMenus:
+- name: নোটসমুহ
+  url: https://hossainemruz.gitbook.io/