featureling v1.0.2
#featureling 
Feature handling package to assist in versioning an api. The package provides the necessary hooks to make a feature list avaliable. It was created to provide the concept of a feature to use for versioning your code. It is utilizing CLS to make the feature list available for an application.
##Usage There are two main methods.
create - Middleware to look at the Accept-Version header and determine available features. This list of feature is place in CLS for use later.
has - Checks if a version is available. This can be used to determine if custom code or legacy behavior needs to be applied.
##Examples
create usage
Use the feature list in your application package.json and the Accept-Version header to determine features available.
app.use(require('featureling').create(require('./package.json').features));Feature List
Your feature list will look something like the following:
"features":{
"1.x":[ "versions","health","lists"],
"0.x":[ "health"]
}has usage
You can then lookup to see if the feature is available.
featureling.has("versions")