Maven, huge refactor, interface changes

Among other things, these interface changes allow for supporting pre-UUID Minecraft versions again. I may eventually backport older versions, but I don't know that I'll be able to lay hands on old enough jars.
Removed static access
Renamed all methods to follow conventions

src/main/java/com/lishid/openinv/commands/OpenInvPluginCommand.java

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2011-2014 lishid.  All rights reserved.
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation,  version 3.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.commands;
+
+import java.util.HashMap;
+import java.util.List;
+
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.scheduler.BukkitRunnable;
+
+import com.lishid.openinv.OpenInv;
+import com.lishid.openinv.Permissions;
+import com.lishid.openinv.internal.ISpecialPlayerInventory;
+
+public class OpenInvPluginCommand implements CommandExecutor {
+    private final OpenInv plugin;
+    public static HashMap<Player, String> openInvHistory = new HashMap<Player, String>();
+
+    public OpenInvPluginCommand(OpenInv plugin) {
+        this.plugin = plugin;
+    }
+
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player)) {
+            sender.sendMessage(ChatColor.RED + "You can't use this from the console.");
+            return true;
+        }
+
+        if (args.length > 0 && args[0].equalsIgnoreCase("?")) {
+            OpenInv.ShowHelp((Player) sender);
+            return true;
+        }
+
+        final Player player = (Player) sender;
+
+        // History management
+        String history = openInvHistory.get(player);
+
+        if (history == null || history == "") {
+            history = player.getName();
+            openInvHistory.put(player, history);
+        }
+
+        final String name;
+
+        // Read from history if target is not named
+        if (args.length < 1) {
+            name = history;
+        }
+        else {
+            name = args[0];
+        }
+
+        new BukkitRunnable() {
+            public void run() {
+                List<Player> matches = Bukkit.matchPlayer(name);
+                final OfflinePlayer offlinePlayer;
+                if (!matches.isEmpty()) {
+                    offlinePlayer = matches.get(0);
+                } else {
+                    offlinePlayer = Bukkit.getOfflinePlayer(name);
+                }
+                if (!player.isOnline()) {
+                    return;
+                }
+                if (offlinePlayer == null || !offlinePlayer.hasPlayedBefore()) {
+                    player.sendMessage(ChatColor.RED + "Player not found!");
+                    return;
+                }
+                new BukkitRunnable() {
+                    public void run() {
+                        if (!player.isOnline()) {
+                            return;
+                        }
+                        openInventory(player, offlinePlayer);
+                    }
+                }.runTask(plugin);
+            }
+        }.runTaskAsynchronously(plugin);
+
+        return true;
+    }
+
+    private void openInventory(Player player, OfflinePlayer target) {
+
+
+        Player onlineTarget;
+
+        if (!target.isOnline()) {
+            // Try loading the player's data
+            onlineTarget = plugin.getPlayerLoader().loadPlayer(target);
+
+            if (onlineTarget == null) {
+                player.sendMessage(ChatColor.RED + "Player not found!");
+                return;
+            }
+        } else {
+            onlineTarget = target.getPlayer();
+        }
+
+        // Permissions checks
+        if (!OpenInv.hasPermission(player, Permissions.PERM_OVERRIDE) && OpenInv.hasPermission(onlineTarget, Permissions.PERM_EXEMPT)) {
+            player.sendMessage(ChatColor.RED + onlineTarget.getDisplayName() + "'s inventory is protected!");
+            return;
+        }
+
+        // Crosswork check
+        if ((!OpenInv.hasPermission(player, Permissions.PERM_CROSSWORLD) && !OpenInv.hasPermission(player, Permissions.PERM_OVERRIDE)) && onlineTarget.getWorld() != player.getWorld()) {
+            player.sendMessage(ChatColor.RED + onlineTarget.getDisplayName() + " is not in your world!");
+            return;
+        }
+
+        // Self-open check
+        if (!OpenInv.hasPermission(player, Permissions.PERM_OPENSELF) && onlineTarget.equals(player)) {
+            player.sendMessage(ChatColor.RED + "You're not allowed to openinv yourself.");
+            return;
+        }
+
+        // Record the target
+        openInvHistory.put(player, onlineTarget.getName());
+
+        // Create the inventory
+        ISpecialPlayerInventory inv = plugin.getOrCreateInventoryFor(onlineTarget, !target.isOnline());
+
+        // Open the inventory
+        player.openInventory(inv.getBukkitInventory());
+    }
+}