Remove dates lookup from summary/full

[philip-lee-ons]

PR merges across some changes from the general tidy up. In light of data now being available in CSV other changes are unlikely to be worth working on.

• summary and full commands get dates from the PDFs rather than a lookup
• Unit tests all run and are runnable from the project root directory
• A few formatting issues fixed
• Legacy modules removed

Note: proc still needs the dates lookup file, was a bigger change to fix it there as well

Testing:

• Unit tests run
• Adhoc checks on output for each command for multiple countries
• GB full file, 2020-04-05, produced is identical to that produced by the current version of project