Moving client and player data into manager classes

Remember: anything with "manager" in its name organizes a number of other
objects, as far as I'm concerned.

I'll eventually have a database connection in the PlayerManager class;
this'll make it easier to manage the database.

server/client_manager.cpp

@@ -0,0 +1,58 @@
+/* Copyright: (c) Kayne Ruse 2014
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "client_manager.hpp"
+
+int ClientManager::HandleConnection(IPaddress add) {
+	ClientEntry c;
+	c.address = add;
+	clientMap[counter] = c;
+	return counter++;
+}
+
+int ClientManager::HandleDisconnection(int i) {
+	for (auto& it : clientMap) {
+		if (it.first == i) {
+			clientMap.erase(it.first);
+			return 0;
+		}
+	}
+	return -1;
+}
+
+ClientEntry* ClientManager::GetClient(int i) {
+	for (auto& it : clientMap) {
+		if (it.first == i) {
+			return &it.second;
+		}
+	}
+	return nullptr;
+}
+
+ClientEntry* ClientManager::GetClient(IPaddress add) {
+	for (auto& it : clientMap) {
+		if (it.second.address.host == add.host &&
+			it.second.address.port == add.port) {
+			return &it.second;
+		}
+	}
+	return nullptr;
+}