update documentation

Author: KazuCocoa

README.md

@@ -52,8 +52,8 @@ opts = {
        appium_lib: {
        }
      }
-@core = Appium::Driver.new(opts) # core driver
-@driver = @core.start_driver     # driver extend selenium-webdriver
+@core = Appium::Core.for(self, opts) # create a core driver with `opts` and extend methods into `self`
+@driver = @core.start_driver
 
 # Launch iPhone Simulator and `MyiOS.app`
 @driver.find_element(:accessibility_id, 'some accessibility') # find an element

lib/appium_lib_core/device/multi_touch.rb

@@ -18,7 +18,7 @@ module Core
     #   multi_touch_action.perform
     #
     #   # with an arbitrary driver
-    #   driver = Appium::Driver.new(opts, false).start_driver
+    #   driver = Appium::Core.for(self, opts).start_driver
     #   multi_touch_action = MultiTouch.new(driver)
     #   multi_touch_action.add action_1
     #   multi_touch_action.add action_2

lib/appium_lib_core/driver.rb

@@ -143,9 +143,11 @@ def initialize(target, opts = {})
       #                wait_interval: 0.3,
       #              }
       #            }
-      #     @core = Appium::Driver.new(opts)
+      #
+      #     @core = Appium::Core.for(self, opts) # create a core driver with `opts` and extend methods into `self`
       #     @driver = @core.start_driver
       #
+
       def start_driver(server_url: nil,
                        http_client_ops: { http_client: nil, open_timeout: 999_999, read_timeout: 999_999 })
         server_url = server_url ? server_url : "http://127.0.0.1:#{@port}/wd/hub"