Pyairmore

Changed
- `AirmoreSession::is_server_running` timeout has been set to 2 seconds
- refers to 2
- closes 3

Changed
- `DeviceService::fetch_device_detail` returns `DeviceDetail` instance
- `Service::request` now returns `requests.Response`

Added
- `DeviceService::take_screenshot` returns `Image` instance from Pillow
- `DeviceScreenshotProcess`
- `DeviceDetail`

Removed
- Properties for device detail moved from `DeviceService` to `DeviceDetail`

Changed
- Travis links on readme

Changed
- Changelog
- Readme
- Versioning