Export data to thedatahub.org

[teleyinex]

For analyzing the data I've been thinking that we could have one or two options:

• export those TaskRuns to the DataHub via a button (the owner of the application will see a button near the finished task that says export and analyze data in the DataHub (or something similar) and/or
• download the data in CSV or an R friendly format to run any statistical analysis on the data.

The DataHub should be the default option as thanks to the recline.js framework it will be possible to create really nice visualizations tools for tabular data out of the box. I guess that in most cases, the output created by the volunteers with PyBossa will fit really well with these tools, so integrating PyBossa and the DataHub will be something really interesting.

[teleyinex]

This has been solved in #478