add header info

docs/modules/wiki/pages/atom_snippets.adoc

@@ -1,4 +1,7 @@
 = Atom Snippets
+:author: mitm
+:revnumber: 1.1
+:revdate: 2020/07/25
 
 Copy and paste this text into your Atom Editor menu:File[Snippets...] page to add some useful shortcuts. Feel free to contribute any changes so other editors can benifit by selecting the "`Edit this Page`" link in the header of this page and submitting a pull request in the wiki repo.
 

docs/modules/wiki/pages/emoji.adoc

@@ -1,6 +1,7 @@
 = Emoji and Icons
 :author: mitm
-:revnumber: 2.0
+:revnumber: 2.1
+:revdate: 2020/07/25
 
 == How to use icons in the wiki
 

docs/modules/wiki/pages/wiki_admin.adoc

@@ -0,0 +1,4 @@
+= Wiki Admin
+:author: mitm
+:revnumber: 1.0
+:revdate: 2020/07/25

docs/modules/wiki/pages/wiki_contributor.adoc

@@ -1,5 +1,7 @@
 = Wiki Contributions
-
+:author: mitm
+:revnumber: 1.0
+:revdate: 2020/07/25
 
 .Prerequisites
 .  Have a link:https://github.com/[GitHub account].