Sort out info mechanism docs

Some of it belongs in the browser-sniff plugin

Also add a `$:/info/node` info tiddler.

core/modules/info/platform.js

@@ -17,6 +17,7 @@ exports.getInfoTiddlerFields = function() {
 		infoTiddlerFields = [];
 	// Basics
 	infoTiddlerFields.push({title: "$:/info/browser", text: mapBoolean(!!$tw.browser)});
+	infoTiddlerFields.push({title: "$:/info/node", text: mapBoolean(!!$tw.node)});
 	return infoTiddlerFields;
 };
 

editions/tw5.com/tiddlers/mechanisms/InfoMechanism.tid

@@ -10,50 +10,5 @@ System tiddlers in the namespace `$:/info/` are used to expose information about
 
 |!Title |!Description |
 |[[$:/info/browser]] |Running in the browser? ("yes" or "no") |
-|[[$:/info/browser/has/tiddlyfox]] |Is TiddlyFox available? ("yes" or "no") |
+|[[$:/info/node]] |Running under [[Node.js]]? ("yes" or "no") |
-|[[$:/info/browser/is/android]] |Running on Android? ("yes" or "no")  |
-|[[$:/info/browser/is/bada]] |Running on Bada? ("yes" or "no")  |
-|[[$:/info/browser/is/blackberry]] |Running on Blackberry? ("yes" or "no")  |
-|[[$:/info/browser/is/chrome]] |Running on Chrome? ("yes" or "no")  |
-|[[$:/info/browser/is/firefox]] |Running on Firefox? ("yes" or "no")  |
-|[[$:/info/browser/is/firefoxos]] |Running on Firefox OS? ("yes" or "no")  |
-|[[$:/info/browser/is/gecko]] |Running on Gecko? ("yes" or "no")  |
-|[[$:/info/browser/is/ios]] |Running on iOS (ie an iPhone, iPad or iPod)? ("yes" or "no")  |
-|[[$:/info/browser/is/ipad]] |Running on iPad? ("yes" or "no")  |
-|[[$:/info/browser/is/iphone]] |Running on iPhone? ("yes" or "no")  |
-|[[$:/info/browser/is/ipod]] |Running on iPod? ("yes" or "no")  |
-|[[$:/info/browser/is/opera]] |Running on Opera? ("yes" or "no")  |
-|[[$:/info/browser/is/phantomjs]] |Running on PhantomJS? ("yes" or "no")  |
-|[[$:/info/browser/is/safari]] |Running on Safari? ("yes" or "no")  |
-|[[$:/info/browser/is/sailfish]] |Running on Sailfish? ("yes" or "no")  |
-|[[$:/info/browser/is/seamonkey]] |Running on Sea Monkey? ("yes" or "no")  |
-|[[$:/info/browser/is/silk]] |Running on Amazon's Silk? ("yes" or "no")  |
-|[[$:/info/browser/is/tiddlydesktop]] |Running on TiddlyDesktop? ("yes" or "no")  |
-|[[$:/info/browser/is/tizen]] |Running on Tizen? ("yes" or "no")  |
-|[[$:/info/browser/is/webkit]] |Running on WebKit? ("yes" or "no")  |
-|[[$:/info/browser/is/webos]] |Running on WebOS? ("yes" or "no")  |
-|[[$:/info/browser/is/windowsphone]] |Running on Windows Phone? ("yes" or "no")  |
-|[[$:/info/browser/name]] |Platform name (see below) |
-|[[$:/info/browser/version]] |Browser version |
 
-The browser information is obtained with [[Bowser, a browser detector library from Dustin Diaz|https://github.com/ded/bowser/]]. Possible browser names include:
-
-* ''"Amazon Silk"''
-* ''"Android"''
-* ''"Bada"''
-* ''"BlackBerry"''
-* ''"Chrome"''
-* ''"Firefox"''
-* ''"Internet Explorer"''
-* ''"iOS"''
-* ''"Opera"''
-* ''"PhantomJS"''
-* ''"Safari"''
-* ''"Sailfish"''
-* ''"SeaMonkey"''
-* ''"TiddlyDesktop"''
-* ''"Tizen"''
-* ''"WebOS"''
-* ''"Windows Phone"''
-
-Note that Bowser returns "iPhone", "iPad" and "iPod" as distinct values for the name of the current browser. TiddlyWiki converts all three distinct values into "iOS" before copying to [[$:/info/browser/name]].

plugins/tiddlywiki/browser-sniff/readme.tid

@@ -0,0 +1,54 @@
+title: $:/plugins/tiddlywiki/browser-sniff/readme
+
+This plugin adds a number of `$:/info/` tiddlers containing information about the current browser.
+
+! Information Tiddlers
+
+|!Title |!Description |
+|[[$:/info/browser/has/tiddlyfox]] |Is TiddlyFox available? ("yes" or "no") |
+|[[$:/info/browser/is/android]] |Running on Android? ("yes" or "no")  |
+|[[$:/info/browser/is/bada]] |Running on Bada? ("yes" or "no")  |
+|[[$:/info/browser/is/blackberry]] |Running on Blackberry? ("yes" or "no")  |
+|[[$:/info/browser/is/chrome]] |Running on Chrome? ("yes" or "no")  |
+|[[$:/info/browser/is/firefox]] |Running on Firefox? ("yes" or "no")  |
+|[[$:/info/browser/is/firefoxos]] |Running on Firefox OS? ("yes" or "no")  |
+|[[$:/info/browser/is/gecko]] |Running on Gecko? ("yes" or "no")  |
+|[[$:/info/browser/is/ios]] |Running on iOS (ie an iPhone, iPad or iPod)? ("yes" or "no")  |
+|[[$:/info/browser/is/ipad]] |Running on iPad? ("yes" or "no")  |
+|[[$:/info/browser/is/iphone]] |Running on iPhone? ("yes" or "no")  |
+|[[$:/info/browser/is/ipod]] |Running on iPod? ("yes" or "no")  |
+|[[$:/info/browser/is/opera]] |Running on Opera? ("yes" or "no")  |
+|[[$:/info/browser/is/phantomjs]] |Running on PhantomJS? ("yes" or "no")  |
+|[[$:/info/browser/is/safari]] |Running on Safari? ("yes" or "no")  |
+|[[$:/info/browser/is/sailfish]] |Running on Sailfish? ("yes" or "no")  |
+|[[$:/info/browser/is/seamonkey]] |Running on Sea Monkey? ("yes" or "no")  |
+|[[$:/info/browser/is/silk]] |Running on Amazon's Silk? ("yes" or "no")  |
+|[[$:/info/browser/is/tiddlydesktop]] |Running on TiddlyDesktop? ("yes" or "no")  |
+|[[$:/info/browser/is/tizen]] |Running on Tizen? ("yes" or "no")  |
+|[[$:/info/browser/is/webkit]] |Running on WebKit? ("yes" or "no")  |
+|[[$:/info/browser/is/webos]] |Running on WebOS? ("yes" or "no")  |
+|[[$:/info/browser/is/windowsphone]] |Running on Windows Phone? ("yes" or "no")  |
+|[[$:/info/browser/name]] |Platform name (see below) |
+|[[$:/info/browser/version]] |Browser version |
+
+The browser information is obtained with [[Bowser, a browser detector library from Dustin Diaz|https://github.com/ded/bowser/]]. Possible browser names include:
+
+* ''"Amazon Silk"''
+* ''"Android"''
+* ''"Bada"''
+* ''"BlackBerry"''
+* ''"Chrome"''
+* ''"Firefox"''
+* ''"Internet Explorer"''
+* ''"iOS"''
+* ''"Opera"''
+* ''"PhantomJS"''
+* ''"Safari"''
+* ''"Sailfish"''
+* ''"SeaMonkey"''
+* ''"TiddlyDesktop"''
+* ''"Tizen"''
+* ''"WebOS"''
+* ''"Windows Phone"''
+
+Note that Bowser returns "iPhone", "iPad" and "iPod" as distinct values for the name of the current browser. TiddlyWiki converts all three distinct values into "iOS" before copying to [[$:/info/browser/name]].