* Overview: storing results in files and DB directly from R.

- Created files:
  - db.R: handles R/W operations to/from database from R.
  - fileStorage.R: handles writing of files from R.
- Adapted sentenceMetrics.R & workerMetrics.R to use the methods from above.
- Deleted lib/output.R (merge with fileStorage.R)
Merge branch 'master' of https://github.com/laroyo/watsonc