package defintion improvements

Added CmdletExists and AppExeExists conditions
Cleanup of existing package description files

base/src/Packagesz.class.inc.ps1

@@ -23,6 +23,7 @@ class Packagesz { #: System.Management.Automation.IValidateSetValuesGenerator {
         $local:valid = $Package.Condition[0].Logic -notin ([szLogic]::or, [szLogic]::ornot)
         $local:currentSys = [SystemName]::_GetValidValues('',$true,$true);
         $local:hostname = $(hostname)
+        $local:allCmdlets = Get-Command | Select-Object -ExpandProperty Name
         
         $local:username = $( if( $env:USER ) { $env:USER } else { $env:USERNAME } )
         
@@ -39,6 +40,14 @@ class Packagesz { #: System.Management.Automation.IValidateSetValuesGenerator {
             if( $v -and $c.Username ) {
                 $v = $v -and $($c.Username | Where-Object { $username -match $_ })
             }
+            if( $v -and $c.CmdletExists ) {
+                $v = $v -and -not $($c.CmdletExists | Where-Object { $allCmdlets -notcontains $_ })
+            }
+            if( $v -and $c.AppExeExists ) {
+                $v = $v -and -not $($c.AppExeExists | Where-Object {
+                        -not ( Get-Command $_ -Type Application -ErrorAction SilentlyContinue )
+                    })
+            }
             if( $v -and $c.custom ) {
                 $v = $v -and ([bool]$(& ([ScriptBlock]::Create($c.custom))))
             }