* fix(d3-fetch): update signatures and expand JSDoc comments
* fix(image): init object is not request init, but rather initializes image element properties
* fix(json): add generic parameter to allow return type casting
* fix(csv, dsv, tsv): overload signatures to be more specific about return type (with or without row parsing function).
* fix(csv, dsv, tsv): update row parsing function signature to be in line with parser signature in d3-dsv, which is called under the hood.
* chore(tslint): add tslint rules to allow signature overloading and single-use generic
* doc(*) Expand JSDoc comments
* chore(tests): update tests
* chore(d3-fetch): add validation reference patch release version
* Updated d3-geo to reflect version 1.9.0: added fitWidth and fitHeight methods
* Fix asterisk position
* Missing space
* Added spacing between methods
* Added tests for d3-geo `fitHeight` and `fitWidth`
* Backbone for d3-fetch
* Completed fetch API
* Strong typings of parsing methods
* Partial d3-fetch tests
* Completed tests for d3-fetch
* Reste library to es6 in d3-fetch
* Fix linting errors
* tentative fix TS 2.1
* Specific types for d3-fetch
* Fix test on d3-fetch
* Removed generic used only once for json function in d3-fetch
* Fix d3-fetch test
