Add new separated version that will be implemented by Swift CLI

For mac apps + kitura server/FastCGI/Nginx
An assistant tool for mobile i18n workflow+RIX

https://developer.ibm.com/swift/kitura/
https://github.com/IBM-Swift/Kitura/blob/master/Documentation/FastCGI.md
https://github.com/ayanonagon/Polyglot
https://github.com/PerfectlySoft/Perfect (hmm..)
https://github.com/vapor/vapor
