A quick Apple Documentation Viewer
How does stash work? Simple, you push cmnd-ctrl-space (or any key combo of your choice), Stash's window pops up, you type your search, you get documentation, fast!
Couldn't be simpler.
Don't forget to run git submodule init and git submodule update to grab the dependencies!
Alternatively run:
git clone --recursive git://github.com/beelsebob/Stash.git
to clone the repository and checkout the submodules in a single step.