Improve sprite creating error handling

Now its easier to see if the script was not able
of generating the sprites
Add Troll Warlord to Dota2
Update toto file leftovers from the last update.
Fix itembuilds.zip being outdated

The link on the html was hardcoded to dotaalttab.com instead of
bing a relative link. Now itembuilds.zip should always be updated,
as long as its uploaded properly to the server.