Merge pull request #4 from michaelavila/add_mit_license

Add MIT license
Update readme
Fix nomenclature per recent discussions
Introduce proper config file
Delete outdated text config
Add ignore property to config
Add deprecated section to config
Run configlet on travis
Update ETL test to match problem description.
Merge pull request #6 from hankturowski/master

Update ETL test to match problem description.
Change name of key for consistency
Add foregone key to config
Change XCTAssertEqual to XCTAssertEqualObjects.

The Objective-C unit tests are testing object equality
in a dictionary, which returns objects of type 'id'.
XCTAssertEqual checks against C-scalars, not objets.