do not show edit tab in the wiki page unless you can edit it

lib/WebGUI/Asset/WikiPage.pm

@@ -346,6 +346,7 @@ sub view {
 		editContent         => $self->getEditForm,
         allowsAttachments   => $self->getWiki->get("allowAttachments"),
 		comments			=> $self->getFormattedComments(),
+        canEdit             => $self->canEdit,
 		content             => $self->getWiki->autolinkHtml(
             $self->scrubContent,
             {skipTitles => [$self->get('title')]},

lib/WebGUI/Help/Asset_WikiPage.pm

@@ -56,6 +56,9 @@ our $HELP = {
             {   name        => 'editLabel',
                 description => 'editLabel variable',
             },
+            {   name        => 'canEdit',
+                description => 'canEdit variable',
+            },
             {   name        => 'historyLabel',
                 description => 'historyLabel variable',
             },

lib/WebGUI/i18n/English/Asset_WikiPage.pm

@@ -118,6 +118,11 @@ our $I18N =
                 lastUpdated => 1166047618,
         },
 
+        'canEdit variable' => {
+                message => q|A boolean that indicates whether the current user can edit a page, or not.|,
+                lastUpdated => 1227501828,
+        },
+
         'historyLabel variable' => {
                 message => q|An internationalized label to go with historyUrl.|,
                 lastUpdated => 1166047618,