Reducing Jackson dependencies to avoid conflicts with JAX-RS Providers

In my application, I have a custom JAX-RS Provider to serialize/deserialize Json with [Gson](https://code.google.com/p/google-gson/) library. When add the java-rest-bind dependency, the application server scans all possible providers and uses the Jackson JAX-RS provider instead of my provider.

Reducing the dependency to only jackson mappers, solve this problem and reduce project size.