Fixes Fluffychat messages containing null as the image dimensions
Fixes Facebookbridge not sending body, even though it is required, for
stickers
Fixes https://github.com/Nheko-Reborn/nheko/issues/166

Fix missing urlencoding for room_id in typing requests.

prev_batch and limited fields are not required; defaults added.

Qt < 5.9 moc chokes on that

Do not create thumbnail info if there is no thumbnail

Merge 0.3.0 dev branch to master

Improve build system and dependency bundling.