Version 3.1 * reworked permissions: permissions are now clearly managed application-wide (no unclear notifications about missing permissions anymore) * minify VTIMEZONEs (doesn’t include observances for times before DTSTART anymore) of sent events/tasks * sync algorithm: reworking with improvements in parallelism, cancelling, exception handling (using parallel coroutines) * account creation/login: suggest all detected email addresses as account name * internal rewrite: now uses latest ical4j/3.x even on Android 5+ with R8 desugaring * minor improvements and bug fixes