Adds a wool gate amongst other things

Adds the wool gate type from legacy
Adds some missing material tag-related code
Updates the URL for update checking

src/main/java/net/knarcraft/stargate/Stargate.java

@@ -365,7 +365,7 @@ public class Stargate extends JavaPlugin {
         this.registerCommands();
 
         //Check for any available updates
-        UpdateChecker.checkForUpdate(this, "https://api.spigotmc.org/legacy/update.php?resource=97784",
+        UpdateChecker.checkForUpdate(this, "https://api.spigotmc.org/legacy/update.php?resource=87978",
                 Stargate::getPluginVersion, Stargate::setUpdateAvailable);
     }