First running version of the CSV exporter for results. Refs #358

This commit does not include yet the unit tests
UTF8 encode for the csv writer.
Unit tests for the CSV built-in exporter. Refs #358
First running version of the CSV exporter for results. Refs #358

This commit does not include yet the unit tests
UTF8 encode for the csv writer.
Unit tests for the CSV built-in exporter. Refs #358
Merge branch 'issue-358-bulk-export-csv' of github.com:PyBossa/pybossa into issue-358-bulk-export-csv
Docs for CSV built-in exporter. Closes #358
Enable the left local browsing links. Refs #358
Merge pull request #377 from PyBossa/issue-358-bulk-export-csv

Issue 358 bulk export csv