The easiest way to get a working version is to switch to the svn version. Then you can fart around with the unfinished additions and have several other bugs and balance issues straightened out.
If it's too much trouble to switch, since you're having issues following the work around, do the actual fix. Go into ABILITY_COMMANDEER and change the target of buffType to BUFF_COMMANDEER. All fixed, no manifest editing or additional files needed. The alternate file has existed the whole time, we just pooched the reference to it.