For anyone who wants to play around with L:

http://droid.cs.fau.de/cm-12.0/pre-alpha-test/new_safestrap/

Things to keep in mind:

 * Install this in a new slot! Do not upgrade any old system!

 * This is not a daily driver!

 * Due to SELinux changes, you _have_ to relabel your data-partition on
   the first boot of a ROM built after 2014-01-17. This only needs to be
   done once.
   To do this, enable adb/usb debugging  and grant root to adb (both in
   developer settings) and execute via an adb shell:

   su -c 'for i in /data/*; do echo "${i}"; restorecon -DFrv "${i}"; done; sync; reboot'

 * Due to constant changes, you may need to wipe data after installing a new
   build. Constant crashes (launcher3, Settings,... ) are an indication for
   this.
 
 * These builds need a new Safestrap-version which correctly supports SELinux
   (set_metadata), see Safestrap-subdirectory for a very early test-build.
 
 * After installing a "new_safestrap" build over an "old_safestrap" build you
   should also reinstall gapps, so they can set their SELinux-metadata properly.
 
 * Current problems:
   * Flashlight QS tile (crashes camera, kill "mediaserver" to revive)
   * CDMA/LTE APNs need to be manually selected sometimes
   * SELinux enforcing might currently prevent previously working apps,
     please look for "denies" in /data/misc/audit/audit.log and forward
     them to me.
   * Rebooting to recovery doesn't work
 
Cheers,
  Michael