json template url + file implementation.
The file contains the json template, and can contain variables that will be extracted from the json in the url. The url is fetched at regular intervals.
- apconfig: configure night time, where the system is not updating tags, and the tags are sleeping
- fixed bug calculating expected checkin
- throttle down apinfo update to once per minute
- fixed too many concurrent requests getting tagtypes
- resend current image when a tag reboots and the content type is 'static image' (all other content types were already regenerating the content)
- fixed timing of main loop
