* Update sync responses
* Fix positions, add ApplyUpdates
* Fix MarshalText as non-pointer, PrevBatch is optional
* Increment by number of read receipts
* Merge branch 'master' into neilalexander/devicelist
* Tweak typing
* Include keyserver position tweak
* Fix typing next position in all cases
* Tweaks
* Fix typo
* Tweaks, restore StreamingToken.MarshalText which somehow went missing?
* Rely on positions from notifier rather than manually advancing them
* Revert "Rely on positions from notifier rather than manually advancing them"
This reverts commit 53112a62cc3bfd9989acab518e69eeb27938117a.
* Give invites their own position, fix other things
* Fix test
* Fix invites maybe
* Un-whitelist tests that look to be genuinely wrong
* Use real receipt positions
* Ensure send-to-device uses real positions too