Show Last Seen, translation fixes, Russian translation.

b508107 Show Last Seen in TopicInfo, update localizations, add missing strings.
66a1806 Fixed handling of LastSeen the same way as on Android.
b9980cf 2a4acad Added Russian translation.
aace2dc Actually add Chinese (hanT) translation to build.

Bug fixes, Traditional Chinese translation

826b7b1 Fix LastSeen not being refreshed properly
b831692 159e4b7 Traditional Chinese translation from @SiderealArt
5bd9219 Run swiftlint on the codebase.
11bb8c8 Sync with Tindroid SDK.
bec1319 Grp topics: reload upon receving new subscription data.
8e58e6a Constrain the size of previews.

App rebranding, bug fixes

• App renamed "Tinode"
• More bug fixes

Full list of changes: v1.6.2...v1.7.1

Message previews and minor bug fixes

• Message previews
• Bug fixes

Full list of changes: v1.6.1...v1.6.2

Support for uploading large images

• Support for sending and receiving large images as links to uploaded files.
• Don't show [undefined] badge when permissions of group members are not available
• Fix URL parsing and presentation
• Channel indicator in chat entry

Full list of changes: v1.5.0...v1.6.1

Support for uploading large images

• Support for sending and receiving large images as links to uploaded files.
• Bug fixes and minor visual improvements.

Channel support

Support for channels: group chats with unlimited number of read-only members.

The new functionality works only with the sandbox server. Production server is not yet updated for channels.

Search and usability improvements, bug fixes

8f8eaaa Fix account deletion.
1d887b8 In contact sync, do not prepend data with prefixes (it's redundant).
1e6b318 Move Connection settings to a separate page in bundle.
22234a0 Fetch user desc in service extension if missing.
ddc7fa9 Explicitly handle "sub" push notifications in the foreground.
58876e7 Attempt fixing {note recv} for push notifications.
59762be Pass background fetch when topic is attached.
1755cf8 Enable push notification background processing.

Full list of changes: v1.3.3...v1.4.0

Spanish, blocked contacts & contacts sync, bug fixes

New features:

• Spanish translation by @sanmiguel2019
• Immediate contacts sync on change
• Support for display of blocked contacts
• Background uploads.
• Key press and read notifications settings are being used now
• Account settings refactored into 4 screens.

Other changes:

• Dropped support for iOS 9
• Pods updated to latest versions
• Fabric Crashlytics updated to Firebase Crashlytics
• Session background indicator moved from {sub} to {hi} packet.

Bug fixes:

• Page loading in MessageViewController fixed
• Fixes: file preview details ui and build.
• Handle auth token expiration.
• Fix auth token loss error.
• Remove race condition in MessageInterctor.sendReadNote.
• Fix saving-retrieving-updating credentials
• Added iCloud entitlement

Full list of changes: v1.2.3...v1.3.3

Incognito mode, account contacts, full i18n, bug fixes

• Incognito mode: ability to be online while appearing offline to other users
• Ability to delete account.
• Chinese translations completed (would be nice for a native speaker to check them).
• PromisedReply substantially refactored.
• Dropped support for iOS 9.

Bug fixes:

• Crash in Drafty fixed.
• Adding and deleting account contacts work as expected now.

Full list of changes: v1.1.1...v1.2.3