[WIP]: Add csv datasets from Analyze Boston

[henrykironde]

Out of 154 datasets we got about 47 datapackages with only CSV data
ref: #34

[henrykironde]

currently testing the data packages.
Current issues:
Some datasets are changing daily or frequently with new random data file names.

• Proposed solution: we check if the files are archived, we can work with monthly updates. Users can easily update a datapackage to get latest changes on their systems.
• Encoding or errors. (scripts are made with autocreate. links are manually added. I will need to follow up by testing individual packages). Remove the encoded data and add it later

[shubhank-saxena]

@henrykironde , for the dynamic datasets that change, we can set up a Celery scheduler, which can then fetch data. And for updating and appending, we can keep changing the last state in the task_scheduler.

[henrykironde]

Thanks @shubhank-saxena for the idea. We do have a retriever dashboard https://github.com/weecology/retrieverdash that could probably use this feature.
I have not used a Celery scheduler but would be nice to discus more about the details and design.