* SMTP notify enhancements: HTML emails and customization options
- Send full HTML emails, with or without inline attached images.
- Custom `timeout`.
- Custom `product_name` identifier for the `FROM` and `X-MAILER` email headers.
- New HTML email test
* `sender_name` instead of product_name
- Change `sender_name` instead of `product_name`.
- No changes in `X-Mailer` header.
- `From` header as always unless you define the new `sender_name` parameter.
* Added error checking to the MIMEImage encoding for smtp.py
Added fallback to file attachment rather than inline image for images
without a known MIME
* PEP8 reqs to fix previous commit
* Add mysensors notify platform
* Make add_devices optional in platform callback function.
* Use new argument structure for all existing mysensors platforms.
* Add notify platform.
* Update mysensors gateway.
* Refactor notify setup
* Enable discovery of notify platforms.
* Update and add tests for notify component and some platforms.
* Continue setup of notify platforms if a platform fails setup.
* Remove notify tests that check platform config. These tests are not
needed when config validation is used.
* Add config validation to APNS notify platform.
* Use discovery to set up mysensors notify platform.
* Add discovery_info to get_service and update tests
* Add discovery_info as keyword argument to the get_service function
signature and update all notify platforms.
* Update existing notify tests to check config validation using test
helper.
* Add removed tests back in that checked config in apns, command_line
and file platforms, but use config validation test helper to verify
config.
* Add a test for notify file to increase coverage.
* Fix some PEP issues.
* Fix comments and use more constants
* Move apns notify service under notify domain
* Added optional embedded image attachments to notify.smtp.
Also restructured a bit to minimize code duplication and add some tests.
* Fixed formatting errors.
* SMTP cleanups thanks to code review.
Also fix so it does not require ip, port, username and password when using local smtp server.
Add debug config.
Signed-off-by: Robert Marklund <robbelibobban@gmail.com>