[Nexus 4 Android Development] Romman0:
Scott's N5 thread has the main version changelog. I'm sure the nightlies might have some other minor tweaks, but the big changes are listed.

http://xdaforums.com/showthread.php?t=2554697

BeanStalk 4.4.215 - 1/10/2014
* Removed goomanager and added BeanStalkOTA app. OTA updates for GAPPs and ROM updates. Huge thanks to the PA team as I used their base OTA package to get started. Please keep in mind that this will only find updates if your device maintaner uploads to the official beanstalk goo account.
* Setup change log webpage at http://www.scotthartbti.com/index.php/beanstalkbuilds/
* Couple of fixes to Active Display
* Added option to view rambar in GB instead of MB
* Changed the busy dialog animation font to match 4.4 UI
* Added Misc features under lockscreen menu which include the following:
- Lockscreen blur
- Lockscreen blur radius
- Lockscreen transparency
- Lockscreen rotation
* Option to set signal icon to either LTE or 4g
* Forward ported notification drawer brightness slider
* Added Gesture navigation
* Added longclick switchbutton
* Sleep Screen shortcut
* Option to set the phone to 2g while screen is locked to save battery
* Hidden 'android animation' planted somewhere secretely in the build
* Added system update to about phone. Setup to point to BeanStalkOTA
* Forward ported sound settings
* Forward ported power connect/disconnect
* Added Stylus gesture features
* Tons of UI fixes and improvements to better suite the 4.4 theme
* Tons of misc fixes and imrpovements throughout.

BeanStalk 4.4.205 - 12/31/2013
* Removed CM performance settings and implemented omni rom performance settings
* Added CPU info option (developer settings)
* Fast Torch option (controlled by holding power button when screen is off)
* Added IME features (languages and input settings)
* Made clear recents button configurable
* Ported circle memory meter for recents
* SlimROM chamber of secrets option (developer options)
* Quick sound record title
* Updated TRDS with newer drawables
* Updated brightness status bar slider code
* New screen record built in app with customizable options from beanstalk display options
* Screen record option can also record audio
* Made the power menu profile switcher optional and fixed the implementation which allows it to follow current power menu style layouts that the user defines. (disabled by default)
* Added screen recorder power menu option (disabled by default)
* Double tap to sleep gesture
* Expanded TRDS to numerous system apps
* MMS bubbles from slimrom
* NUMEROUS fixes and improvements throughout.

Hammerhead Nexus 5 ONLY
* Fixed up lazy dirty flasher boot script. Actually works now
* Kernel improvements throughout
* built kernel with new linaro toolchain
* Added stereo wide audio affect
* updated init script for custom kernel

BeanStalk 4.4.200 - 12/18/2013
* Fixed variable lock pattern issue. Works as it should now.
* Add lockscreen rotation as an optional rotation setting
* Forward ported power widgets - located in quicksettings and notification drawer menu.
* Ported fixes and additional power widgets
* Option to set active/inactive colors for power widgets
* Option to set headset to launch voice commands
* Allow to disable quicksettings completely
* fix for screenshot animation glitch in portrait
* new busy dlg animation from skyliner
* Quicksettings fliptile when clicking a tile
* AudioEffect: Add a stereo widener effect
* AudioFX: Add center frequency param to bassboost
* update icons and remove cm specific icons.
* allow disabling call end sound
* QS: make dynamic tiles configurable
* Custom lockscreen handle
* Beanstalk shortcut options (this is all slims work, just renamed to beanstalk)
* Custom carrier label
* Added brightness slider (swipe status bar to control brightness when enabled)
* Updated density changer to set density on the fly. No longer requires a reboot!
* Wake on connect/disconnect option
* Numerous fixes and improvements throughout the build

Nexus 5 specific changes
* Added bsbootscript to ensure files that conflict with the kernel are not being used. (for you dirty flashers)
* Numerous kernel improvements

BeanStalk 4.4.100 - 12/09/2013
* Merged AOSP 4.1.1_r1 source code
* Reverted app sidebar for now. Caused issues with both nav and capacitive keys.
* Revamped quiet hours logic
* Reverted CM quicksettings.
* Ported Slim Quicksettings. Fully customizable.
* Lockscreen colors and lock images from slim
* Master switch added for HALO by popular demand
* More additions for Active Display and a couple fixes.
* Fix keyguard layout for sw320dp devices
* Development shortcut in statusbar and notification area to wipe data and force close an application
* Added stand alone file manager from Omni
* Fixed enable/disable of notification while screen is on option
* Numerous fixes/improvements throughout the build

**Nexus 5 only**
FULL WIPE HIGHLY SUGGESTED to avoid conflicts with new kernel!!!
Added custom kernel
Picks from popular kernel devs across the threads
Numerous improvements and optional mods that can be controlled with apps such as trickster kernel mod.
OC up to 2500+
Ability to UV
Faux sound mods
Thermal Control
Compiled with Linaro toolchain
and pretty much everything else you would ever need in a kernel.

BeanStalk 4.4.015 - 12/04/2013
* Readded QuickSettings from CM.
* Suspend Actions and Wakelock Blocker
* Fix Navbar for devices with hardware keys
* Expanded desktop
* Configurable device rotation
* Active Display
* LockScreen Targets
* Disable full screen keyboard in landscape mode.
* Force show enter key in keyboard
* Built in screen recorder (volume up + power to activate and disable)
* HALO
* Quick Unlock
* Brought back all lockscreen widget settings
* Implement a pin keypad shuffler
* Add gesture based lockscreen security.
* Add support for variable size pattern lockscreen
* Port forward chameleon App sidebar
* Allow disabling non intrusive incall UI
* Less notification sounds
* Added back button settings
* Changed previous settings layout a bit
* Added build.prop modder
* NUMEROUS additions and fixes scattered across the build
* Current CM sources