display icons to plugins and themes marketplace

LEGALNOTICE

@@ -228,6 +228,14 @@ THIRD-PARTY CONTENT
 	Notes:
 	- used in ImageGraph plugin
 
+	Name: plugins/CorePluginsAdmin/images/themes.png
+	Link: https://www.iconfinder.com/icons/17022/colors_draw_paint_icon
+	License: Free for commercial use
+
+	Name: plugins/CorePluginsAdmin/images/plugins.png
+	Link: http://findicons.com/icon/94051/tools_wizard?id=396912
+	License: GNU/GPL
+
 Notes:
 - the "New BSD" license refers to either the "Modified BSD" and "Simplified BSD"
   licenses (2- or 3-clause), which are GPL compatible.

plugins/CorePluginsAdmin/stylesheets/marketplace.less

@@ -4,7 +4,7 @@
   .introduction { max-width:980px; }
   .byPlugins { width:50%;float:left; }
   .byThemes { width:50%;float:left; }
-  .teaserImage { width: 250px; height: 250px; }
+  .teaserImage { width: 128px; height: 128px; margin: 64px; }
   .header { font-size: 1.6em; }
   .callToAction { font-size: 1.1em;line-height: 2em; }
 }

plugins/CorePluginsAdmin/templates/extend.twig

@@ -37,7 +37,7 @@
                 <span class="callToAction">by <a href="{{ linkTo({'action':'browsePlugins', 'sort': ''}) }}">installing a new plugin from the Marketplace</a></span>
 
                 <p>
-                    <a href="{{ linkTo({'action':'browsePlugins', 'sort': ''}) }}"><img class="teaserImage" alt="Install a new plugin" src=""/></a>
+                    <a href="{{ linkTo({'action':'browsePlugins', 'sort': ''}) }}"><img class="teaserImage" alt="Install a new plugin" src="plugins/CorePluginsAdmin/images/plugins.png"/></a>
                 </p>
 
                 <span class="callToAction">
@@ -54,7 +54,7 @@
                 <span class="callToAction">by <a href="{{ linkTo({'action':'browseThemes', 'sort': ''}) }}">installing a new theme from the Marketplace</a></span>
 
                 <p>
-                    <a href="{{ linkTo({'action':'browseThemes', 'sort': ''}) }}"><img class="teaserImage" alt="Install a new theme" src=""/></a>
+                    <a href="{{ linkTo({'action':'browseThemes', 'sort': ''}) }}"><img class="teaserImage" alt="Install a new theme" src="plugins/CorePluginsAdmin/images/themes.png"/></a>
                 </p>
 
                 <span class="callToAction">