Rework model to fit new functionality.

models/guilds.js

@@ -7,6 +7,7 @@ new Schema(
         name: {type: String, required: false, max: 100},
         memberCount: {type:Number, required: false},
         gID:{type:String, required:true, unique:true},
+        allowInvites:{type:Boolean, required:true},
         strikes:{type:Boolean},
         music:{type:Boolean},
         ytFeeds:{type:Boolean}