Moving social menu to data file, using templates for file downloads, removing download folder.

data/menu.yaml

@@ -0,0 +1,23 @@
+social:
+- name: Mastodon
+  icon: mastodon
+  URL: https://mastodon.technology/@Ad5001
+- name: Twitter
+  icon: twitter
+  URL: https://twitter.com/Ad5001P4F
+- name: Gitea
+  icon: git
+  URL: https://git.ad5001.eu/Ad5001
+- name: Github
+  icon: github
+  URL: https://github.com/Ad5001
+- name: Stackoverflow
+  icon: stackoverflow
+  URL: https://stackoverflow.com/users/7520341/ad5001
+- name: Firefox Addon Developer 
+  icon: firefox
+  URL: https://addons.mozilla.org/<lang>/firefox/user/12994006/
+- identifier: mail
+  name: Mail
+  icon: mail
+  URL: "" # Filled with JS to avoid spam.