Adds comments and simplifies some of the code

Adds a PortalOption enum to simplify portal options
Adds a BungeeHelper class to collect the bungee-related code

src/main/java/net/knarcraft/stargate/command/CommandReload.java

@@ -16,6 +16,7 @@ public class CommandReload implements CommandExecutor {
 
     /**
      * Instantiates the reload command
+     *
      * @param plugin <p>A reference to the calling plugin object</p>
      */
     public CommandReload(Stargate plugin) {