iOS 8.1 is out, and here's everything that's changed

iOS 8.1 was released a short time ago. Among the hallmark features are the addition of Apple Pay support for iPhone 6 and iPhone 6 Plus, along with new features and functionality like MMS/SMS Handoff support on supported Macs. There's a lot of other stuff besides. Here's the complete list, according to Apple's release notes:

Apple Pay support for iPhone 6 and iPhone 6 Plus (U.S. only)
Photos includes new features, improvements and fixes
- Adds iCloud Photo Library as a beta service
- Adds Camera Roll album in Photos app and My Photo Stream album when iCloud Photo Library is not enabled.
- Provides alerts when running low on space before capturing Time Lapse videos
Messages includes new features, improvements and fixes
- Adds the ability for iPhone users to send and receive SMS and MMS text messages from their iPad and Mac
- Resolves an issue where search would sometimes not display results
- Fixes a bug that caused read messages to not be marked as read
- Fixes issues with group messaging
Resolves issues with Wi-Fi performance that could occur when connected to some base stations
Fixes an issue that could prevent connections to Bluetooth hands-free devices
Fixes bugs that could cause screen rotation to stop working
Adds an option to select between 2G, 3G or LTE networks for cellular data
Fixes an issue in Safari where videos would sometimes not play
Adds AirDrop support for Passbook passes
Adds an option to enable Dictation in Settings for Keyboards, separate from Siri
Enables HealthKit apps to access data in the background
Accessibility improvements and fixes
- Fixes an issue that prevented Guided Access from working properly
- Fixes a bug where VoiceOver would not work with 3rd party keyboards
- Improves stability and audio quality when using MFi Hearing Aids with iPhone 6 and iPhone 6 Plus
- Fixes an issue with VoiceOver where tone dialing would get stuck on a tone until dialing another number
- Improves reliability when using handwriting. Bluetooth keyboards and Braille displays with VoiceOver
Fixes an issue that was preventing the use of OS X Caching Server for iOS updates