only add num* attributes to job json when there is any meaningful data available (when status is finished or failed)
logging the port the HttpListener uses
configurable Access-Control-Allow-Origin header for HTTP access control
log postgresql error context if it is available
remove excess parenthesis from sql statement of remove-by-attributes method
setting version number to 0.1.5 and creating changelog entry
Merge branch 'master' into debian-wheezy

* master:
  setting version number to 0.1.5 and creating changelog entry
  remove excess parenthesis from sql statement of remove-by-attributes method
  log postgresql error context if it is available
  configurable Access-Control-Allow-Origin header for HTTP access control
  logging the port the HttpListener uses
  only add num* attributes to job json when there is any meaningful data available (when status is finished or failed)