Updated README
Package as node module and make it available in npmjs.org

Published at https://www.npmjs.org/package/cldrpluralparser
Use the MIT License

Closes #13
Merge pull request #13 from Krinkle/mit-license

Use the MIT License
Version bump 1.1.3

Updated after license change to MIT
Also available at https://www.npmjs.org/package/cldrpluralruleparser