Renamed and moved analytics pages to its own directory
Modified paths and urls to adapt to new analytics directory
- Changed require_once dbinfo in dataproc.inc (changed path in php.ini)
- Removed data files (static and for testing, not used anymore).
(Minor) Fixed url to sentence analytics
- Corrected pivot table functionality.

* The code for obtaining the pivot table to generate the analytics page for a job was embedded in dataproc/job_analytics.php, calling to getPivotTable.R
It has been moved to dataproc, and then called from analytics/job.php (which is the correct location).
- Added envars (to call R scripts).
- Corrected small bug (missing increment on iterator)