Merge pull request #9 from SiftScience/bstein_dev

(for Evie) Fix synchronous scoring + unit tests.
Including Services_JSON from local directory instead of fetching from pear repo
Merge pull request #11 from SiftScience/alex_remove_pear_package_dep

(For Carl) Don't use composer for Services_JSON dependency
Manually set version for packagist.
Add user-agent string to request headers.
Changed version number to 1.0.4
Merged in remote bstein_dev