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/en/author.yaml

@@ -0,0 +1,18 @@
+# some information about you
+name: "Jane Doe"
+nickname: "Jane"
+# greeting message before your name. it will default to "Hi! I am" if not provided
+greeting: "Hi, I am"
+image: "images/avatar.png"
+# give your some contact information. they will be used in the footer
+contactInfo:
+  email: "janedoe@example.com"
+  phone: "+0123456789"
+
+# some summary about what you do
+summary:
+  - I am a Developer
+  - I am a Devops
+  - I love servers
+  - I work on open-source projects
+  - I love to work with some fun projects