Ready for node with fs.

- made sr-a-a-s ready for node with fs (replacement for path)
- update node to v0.8.4
- update express to v3.x
Merge pull request #29 from eonlepapillon/master

Made sr-a-a-s ready for node with fs
Merge remote-tracking branch 'remotes/upstream/master' into phantomjs-args
made addition phantomjs arguments configurable through yaml file