Add displaying version and help information
added JSON output using the --json option
switch to --format option instead of --json, display helpful error message when unknown format requested
update README to use new format option
Merge branch 'pr/18' into develop
Merge pull request #21 from caolan/json-format-option

added JSON output using the --json option
Overhauled parker.js file.
Added new stdin switch
Added new CSV result formatter
Added Metrics documentation
Added usage documentation
Added installation documentation
Added contributing documentation
Added testing instructions to contributing docs
Added numeric option documentation to Info.js
Added hyperlinks to docs
Changes to docs structure to help navigation on GitHub
Added extra hyperlink to authoring in Metrics doc introduction
Restored a missing comma from Info lib file
Fixed media query regex to anticipate optional whitespace between media keyword and query (Fixes #19)