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.
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
Merge pull request #63 from jordanbtucker/housekeeping

Convert source to String in parse
Merge branch 'develop' of https://github.com/aseemk/json5 into develop