Release notes for xxter update 2.7

Harm Elzinga

- Doorbird support for Android and iOS apps
- Snapshots in email support
- HTTP command can now be send to devices with self-signed certificates
- firmware: clear user log option added
- firmware: firmware update will now ask to make an cloud backup first
- my.xxter: Improved design, to improve usability
- my.xxter: Snapshot improvements (delete selected)
- my.xxter: Guided installation
- my.xxter: Automated profile generation improvements
- my.xxter: Support for zones in pages
- my.xxter: User preferences
- many minor improvements and bug fixes