- Added error message when no job_id parameter is passed.
- Added outputfile path+name variable.
(Minor) Bug: changed incorrect array declaration
* Added environment-variables file for R (envars.R)
* Modified scripts to user environmental variables instead of absolute references.
* sentencemetrics:
  - Retrieving the crowdflower results from the database, instead of from a file.
* Interactivextract.php:
  - Modified to run it either as command-line script or from the browser.
* genAnalysisfiles
  - Modified to return more appropriate HTTP (error) codes and messages.
Merge branch 'master' of https://github.com/laroyo/watsonc