fixes ruby behavior on added strings with capitals

The previous implementation didn't do any lowercasing on the word list, so added words containing capital letters were never filtered for.
Use a single regular expression instead of a for loop.
Improve test coverage to include partial word match as per specification.
Use require to load json and simplify json file.
Reflect changes in json in ruby code.
Merge pull request #10 from puckey/master

Use a single regular expression instead of a for loop.
updating npm version
Merge pull request #7 from mambocab/rb-caps-in-added-words

fixes ruby behavior on added strings with capitals