Last night a new nightly build of the popular Liquid Smooth rom was released for the Nexus 5 Hammerhead. This build includes several fixes which are worth the update flash including a fix for all system UI force closes, and some new features such as a re base of the framework on top of the new theme changer, added cm lock screen wallpaper and theme chooser support, and more. There are also a few performance enhancements included like 4.84 saber-mod tool chain, and new build optimizations. You can find downloads for the new nightly and gapps below.
Nightly build
Gapps