Fixes ls: cannot access vendor/nginx: No such file or directory in debug mode

Error prevented slug compilation if debug mode was turned on and threw the following error:

ls: cannot access vendor/nginx: No such file or directory
Update CONTRIBUTING.md
Update CONTRIBUTING.md

Added --acl-public to copy
Added node support
Added node compiler
Merge pull request #62 from Azer-/patch-1

Update CONTRIBUTING.md, added s3cmd cp example
Removed node installation from composer.json & add node to PATH
use the new semver.io/node/resolve/{range} URL syntax
Added some node documentation
Added cache warmuping and seding for sf2
Seding caches pathes directly in app/cach for speed
Test autoUpdate composer
Merge pull request #63 from Azer-/feature/node

Added node throught package.json
Merge pull request #67 from Azer-/feature/symfony2-cache

Feature/symfony2 cache
Merge pull request #59 from hedinfaok/patch-2

Fixes ls: cannot access vendor/nginx: No such file or directory in debug