Address security issues with dependency

Thanks@okcoker for improving parameter values for non string parameters.

See:#39

This release:

• fixes the encoding and sorting of parameter names
• tests examples inside the RFC 5849 plus subsequente Errata ID 2550

No functionality changes

The following is an example foor encoded or non encoded signature generation:

encodedSignature=oauthSignature.generate(httpMethod,url,parameters,consumerSecret,tokenSecret),nonEncodedSignature=oauthSignature.generate(httpMethod,url,parameters,consumerSecret,tokenSecret,{encodeSignature:false});