new error classes

OBSWSConnectionError, OBSWSRequestError added

they subclass OBSWSError

readme updated with new error classes

lib/obsws.rb

@@ -1,5 +1,42 @@
+require "digest/sha2"
+require "json"
+require "waitutil"
+require "socket"
+require "websocket/driver"
+require "logger"
+
+require_relative "obsws/logger"
+require_relative "obsws/driver"
+require_relative "obsws/util"
+require_relative "obsws/mixin"
+require_relative "obsws/base"
+
 require_relative "obsws/req"
 require_relative "obsws/event"
 
+require_relative "obsws/version"
+
 module OBSWS
+  class OBSWSError < StandardError; end
+
+  class OBSWSConnectionError < OBSWSError; end
+
+  class OBSWSRequestError < OBSWSError
+    attr_reader :name, :code
+
+    def initialize(name, code, msg)
+      @name = name
+      @code = code
+      @msg = msg
+      super(message)
+    end
+
+    def message
+      msg = [
+        "Request #{@name} returned code #{@code}."
+      ]
+      msg << "With message: #{@msg}" if @msg
+      msg.join(" ")
+    end
+  end
 end