Updated the endpoint for DPL data.
Updated importer column headers and related fixture files to reflect changes made to the source file.
Oversight in '#parse_american_date' describe title
Recreate CSL indices before importer specs run.
String#typeize now returns a symbol.
Makes model_class an instance method of Importer.
Importer#import_then_purge_old.
Add purge_old to CSL;

Also: add spec examples that test whether or not an importer can purge
old documents.
Adds can-purge-old-documents to Parature FAQ.
Add delay to mocked importer.

It seems that in some runs the importer purges olds docs before ES
assigns a timestamp to the new doc (just a guess). Anyway, this sleep
somewhat mimics real life usage so I'm ok with it.
Move TradeEvent to ItaTradeEvent.

[#77714604]
TradeEvent module: better org. of related classes.
Developer sees SBA Events feed.

[#77508648]
Reorganize TradeEvents::Ita specs.
Ability to index all Trade Event sources.
Consolidated Trade Events API spec.
Able to filter cons. Trade Events by sources.
TEMPORARILY disable TTL for staging.
Developer sees Ex-Im trade events.

[#77045504]

Conflicts:
	app/models/trade_event/consolidated.rb
	lib/tasks/ita.rake
SBA's street field maps to address.