add test case for duplicate keys
allow duplicate keys in objects
use json whitespace

Use JSON whitespace: <SP>, <TAB>, <CR>, and <LF>.
Throw on any characters with a Unicode code point value of 0x1F or less.
fix travis-ci node versions
Merge pull request #62 from jordanbtucker/travis-ci-node-version

Fix Travis CI Node versions
convert source to string

http://es5.github.io/#x15.12.2
break single line comments on \r
fix travis-ci node versions
fix indent size
Merge pull request #59 from jordanbtucker/allow-duplicate-keys

Allow duplicate keys
add test case for duplicate keys
allow duplicate keys in objects
fix indent size
add test case for duplicate keys
allow duplicate keys in objects
fix travis-ci node versions
fix indent size
add test case for duplicate keys
allow duplicate keys in objects
fix indent size