ninja-autocomplete setup problem

shell

Development»git clone git@github.com:pixtur/ninja-autocomplete.git ~/Development
fatal: destination path '/Users/pixtur/Development' already exists and is not an empty directory.
Development»rm ninja.autocomplete/
rm: ninja.autocomplete/: is a directory
Development»rm -r ninja.autocomplete/
Development»git clone git@github.com:pixtur/ninja-autocomplete.git ~/Development
fatal: destination path '/Users/pixtur/Development' already exists and is not an empty directory.
Development»git clone git@github.com:pixtur/ninja-autocomplete.git ~/Development/ninja.autocomplete
Cloning into '/Users/pixtur/Development/ninja.autocomplete'...
remote: Counting objects: 239, done.
remote: Compressing objects: 100% (186/186), done.
remote: Total 239 (delta 133), reused 153 (delta 47)
Receiving objects: 100% (239/239), 37.69 KiB | 47 KiB/s, done.
Resolving deltas: 100% (133/133), done.
Development»cd ~/Development/ninja.autocomplete
ninja.autocomplete»npm install
npm http GET https://registry.npmjs.org/ninja
npm http 304 https://registry.npmjs.org/ninja
ninja@1.1.24 node_modules/ninja
ninja.autocomplete»npm start

> ninja-autocomplete@1.1.25 start /Users/pixtur/Development/ninja.autocomplete
> ./node_modules/ninja/node_modules/grunt/bin/grunt start

sh: ./node_modules/ninja/node_modules/grunt/bin/grunt: No such file or directory
npm ERR! ninja-autocomplete@1.1.25 start: `./node_modules/ninja/node_modules/grunt/bin/grunt start`
npm ERR! `sh "-c" "./node_modules/ninja/node_modules/grunt/bin/grunt start"` failed with 127
npm ERR! 
npm ERR! Failed at the ninja-autocomplete@1.1.25 start script.
npm ERR! This is most likely a problem with the ninja-autocomplete package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     ./node_modules/ninja/node_modules/grunt/bin/grunt start
npm ERR! You can get their info via:
npm ERR!     npm owner ls ninja-autocomplete
npm ERR! There is likely additional logging output above.

npm ERR! System Darwin 12.2.0
npm ERR! command "node" "/usr/local/bin/npm" "start"
npm ERR! cwd /Users/pixtur/Development/ninja.autocomplete
npm ERR! node -v v0.8.11
npm ERR! npm -v 1.1.62
npm ERR! code ELIFECYCLE
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /Users/pixtur/Development/ninja.autocomplete/npm-debug.log
npm ERR! not ok code 0