gem skeleton generated with gemmy

This provides a syntax somewhat similar to Javascript's shorthand for constructing hashes.

This code is copied from a stack overflow answer authored by user akuhn:

http://stackoverflow.com/a/41456114/2981429

Usage:

1. gem 'keyword_hash_builder'

2. require 'keyword_hash_builder'

3. load patch in one of two ways:

4. globally

      KeywordHashBuilder.load_globally
   

5. refinement

     # in a class / module definition
     using KeywordHashBuilder.patch
   

6. Use this syntax:

    a = 1
    b = 2
    c = String
    puts `a,b,c`
    # => { a: 1, b: 2, c: String }