v1.0-alpha3 release
Includes:
- Detect any installation issues on templates screen - civicrm/mosaico/index?reset=1. Checks are done for imagick, fileinfo, writeable directories, resource url.
- Checks can also be forced with runcheck=1 argument e.g civicrm/mosaico/index?reset=1&runcheck=1.
- Use civi upload directories for uploading images.
- Auto create static directory on extension installation.
- Make templates screen look more like civi screens.