feat: init device with optional serial, port, mjpeg port (#14)

* feat: init device with optional serial, port, mjpeg port

* fix: solve some feedbacks

Merge pull request #13 from debugtalk/master

add a helper function to get initialized giDevice.Device from gwda.Device

feat: new function `Close` used to close inner connections properly

fix: avoid panic

feat: support to provide a scope for the XML page source

> appium/WebDriverAgent#544

fix: avoid request timeout

fix: add perform lock ( only `USB` mode )

fix: Avoid the connection being closed due to `usbmuxd` timeout

feat: support to trigger IO HID events

> appium/WebDriverAgent#494

fix: fix read timeout error

- NewDriver
  make `mjpegClient` work correctly