Added SVG to PNG conversion tool, Added tool page and code

Update .gitignore, sidebar.php, and 17 more files...

commons/strings/fr/sidebar.json

@@ -5,6 +5,7 @@
   "sidebar.text.applications": "Applications",
   "sidebar.text.libraries": "Librairies",
   "sidebar.text.electronics": "Électronique",
+  "sidebar.text.tools": "Outils",
   "sidebar.text.links": "Liens",
   "sidebar.text.downloads": "Téléchargements",
   "sidebar.text.gitea": "Dépôts Git",