Added permission overwrites in channels and potential bug fix

Bug may have potentially been fixed under MESSAGE_UPDATE

lib/ChannelPermissions.js

@@ -71,6 +71,44 @@ var ChannelPermissions = (function () {
 	};
 
 	_createClass(ChannelPermissions, [{
+		key: "asAllowDisallow",
+		get: function get() {
+
+			var allow = 0,
+			    disallow = 0;
+
+			function ad(value, position) {
+				if (value) {
+					allow |= 1 << position;
+				} else {
+					disallow |= 1 << position;
+				}
+			}
+
+			ad(this.canCreateInstantInvite, 0);
+			ad(this.manageRoles, 3);
+			ad(this.manageChannels, 4);
+			ad(this.readMessages, 10);
+			ad(this.sendMessages, 11);
+			ad(this.sendTTSMessages, 12);
+			ad(this.manageMessages, 13);
+			ad(this.embedLinks, 14);
+			ad(this.attachFiles, 15);
+			ad(this.readMessageHistory, 16);
+			ad(this.mentionEveryone, 17);
+			ad(this.voiceConnect, 20);
+			ad(this.voiceSpeak, 21);
+			ad(this.voiceMuteMembers, 22);
+			ad(this.voiceDeafenMembers, 23);
+			ad(this.voiceMoveMembers, 24);
+			ad(this.voiceUseVoiceActivation, 25);
+
+			return {
+				allow: allow,
+				deny: disallow
+			};
+		}
+	}, {
 		key: "createInstantInvite",
 		get: function get() {
 			return this.getBit(0);