[Epic] Polish Core Datasets

[sglavoie]

As a PM, I want to review core datasets and make sure all of them are up to date so that I'm sure in their quality

As a PM, I want to re-run and make sure scrapers/scripts are working fine so that I can update data anytime

As a PM, I want to translate scrapers/scripts into dataflows, where possible, so that we use our tools to get the data, plus we can easily update them

As a PM, I want to review READMEs of the core dataset and update where necessary, so that I (and users) are sure that dataset descriptions are accurate enough

Acceptance Criteria

• [x] We have the latest data for all core datasets
• [ ] We have all of the non-complex scripts working OK (unless the source is broken)
• [ ] We have the missing sources and complex scripts fixed up
• [x] READMEs are up to date
• [x] We use dataflows to get the data
  • [ ] Automated by Travis

Tasks

• [x] List all datasets
• [x] Find and fix the non-complex scripts that are not currently working and review READMEs
• [x] Fix scripts that are complex and have non-common errors
• [x] translate scripts to dataflows
• [ ] Fix/refactor more simple scripts addendum #267
• [ ] Fix the broken source datasets #266
• [ ] Fix scripts that require further analysis and debugging #265
• [ ] Run on schedule by travis

Created by @zelima

[rufuspollock]

FIXED or DUPLICATE of https://github.com/datasets/awesome-data/issues/376