Added vscode install

i.win.js

   scripthostName = 'wsh'
   WScript.Echo(WScript.FullName)
 
+  // WScript.Echo('--' + WScript.Arguments(0) + '--')
+  // WScript.Echo('------------ALL-----------')
+  // var argEnumerator = new Enumerator(WScript.Arguments)
+  // for(; !argEnumerator.atEnd(); argEnumerator.moveNext()){
+  //     WScript.Echo('-arg-' + argEnumerator.item() + '-arg-')    
+  // }
+
+
+  // // Unnamed
+  // WScript.Echo('------------UNNAMED-----------')
+  // argEnumerator = new Enumerator(WScript.Arguments.Unnamed)
+  // for(; !argEnumerator.atEnd(); argEnumerator.moveNext()){
+  //     WScript.Echo('-arg-' + argEnumerator.item() + '-arg-')    // Value
+  // }
+
+  // // Named
+  // WScript.Echo('------------NAMED-----------')
+  // argEnumerator = new Enumerator(WScript.Arguments.Named)
+  // for(; !argEnumerator.atEnd(); argEnumerator.moveNext()){
+  //     // WScript.Echo('-arg-' + argEnumerator.item(argEnumerator) + '-arg-')   // Key
+  //     WScript.Echo('-key-' + argEnumerator.item() + '-key-')    // Key
+  //     WScript.Echo('-val=' + WScript.Arguments.Named(argEnumerator.item()) + '=val-')    // Value
+  // }
+
+  var all = WScript.Arguments.Named('all');
+ 
   console = { 
       log : function(m) { WScript.Echo(m)}
     , error : function(m) {WScript.Echo(m) } 
     var downloadtasks = [];
     var installtasks = [];
     prerequisites.forEach(function(preq) {
+      if(!all && preq.optional) return
       var p = preq.exists().then(function(exists) {
         if (exists) console.log( preq.shellcmd + ' exists');
         else {
   // var ENV = Object.assign({}, process.env); // Shallow clone it.
   var WshShell = WScript.CreateObject("WScript.Shell")
   var ENV = WshShell.Environment("Process")
-  WScript.echo( ENV("Path") )
+  // WScript.echo( ENV("Path") )
   function sysAddPathVar(path){
+
+    return true; // PB : TODO -- Not yet enabled. Remove sys path from path before saving.
     // Object.assign({
     //   inherit: true, shell: true, env: ENV, title: `${command} ${args}`
     // }, options)
     }
     , { 
         shellcmd: 'python2'
+        , optional : true
         , url: 'https://www.python.org/ftp/python/2.7.18/python-2.7.18.amd64.msi'
         , installer: 'python-2.7.18.amd64.msi'
         , installcmd: ['MSIEXEC.exe', ['/i'
         , postinstallsteps : function() { return sysAddPathVar('%USERPROFILE%\\AppData/Local\\Microsoft\\WindowsApps') }
         , exists : exists
     }
-    , 
-    {
+    , { 
+      shellcmd: 'code'
+      , optional : true
+      , url: 'https://vscode-update.azurewebsites.net/latest/win32-x64/stable'
+      , installer: 'vscode-win32-x64-latest-stable.exe'
+      , installcmd: ['cmd', ['/c', 'start',
+          '/WAIT', downloadsdir + '/' + 'Git-2.33.0.2-64-bit.exe'
+          , '/VERYSILENT'
+          // , '/MERGETASKS=!runcode' // This is required only for vscode...
+        ]]
+      , preinstallsteps : function() { return Promise.resolve(true) }
+      , install : function() { 
+        var self = this; 
+        var ifns = [self.installcmd]
+        if(!ifns.map) ifns.map = map;
+        console.log('Installing')
+        return any(ifns.map(callsheltask))['catch'](function(e){ 
+          if(e.code === 1602) {
+            console.warn("Installation was probably cancelled.")
+          }
+          else throw e
+        }).then(function(){
+          return self.postinstallsteps()
+        })
+      }
+      , postinstallsteps : function() { return sysAddPathVar('%USERPROFILE%\\AppData/Local\\Microsoft\\WindowsApps') }
+      , exists : exists
+    }
+    , {
       shellcmd: 'elxr'
       , installcmd: [ isWin() ? 'npm.cmd' : 'npm' , ['link'], { cwd : selectedinstance.root + '\\elxr' /* cwd should be the cloned dir*/}]
       , preinstallsteps: function() {