Pyairmore

Added
- "Services" chapter for documentation
- "Device Services" section

Changed
- Minor stylistic fixes

Added
- Docstring for `request` package
- Docstring for `AirmoreSession` class
- Docstring for root package
- Docstring for `services` package
- Docstring for `Service` class
- Docstring for `Process` class
- Docstring for `ServerUnreachableException`
- Docstring for `AuthorizationException`
- Docstring for `services.device` package
- Docstring for `DeviceDetail` class
- Docstring for `DeviceDetailProcess`
- Docstring for `DeviceScreenshotProcess`
- Docstring for `DeviceService`

Changed
- Refactored `ServerIdleException` to `ServerUnreachableException`

Changed
- Travis will upload to Pypi on only tags

Changed
- Now Travis deploys if branch is master

Changed
- Now Travis deploys after covarage

Added
- Automatic releases on Pypi after test is successful on master with a tag in Travis