Bug fixes

64bd235 iOS unread counters: increment only on msg event.
961f722 iOS: Do not show push alert for silent notifications.
f700e20 Do not present system alert for video calls push notifications.
78c3230 Fix Bug: When Init-DB by json file, ignore tags of user if defined
9dfef7d Fix build script: add missing tinode.conf and add .exe to Windows binaries.