nextaction-rs 0.2.1

Add nextaction tag to todoist obeying omnifocus' way
use hyper::error::Error as HyperError;
use std::io::Error as StdIOError;
use serde_json::Error as SerdeError;

error_chain! {
    links { }

    foreign_links { 
        HyperError(HyperError);
        IoError(StdIOError);
        JsonError(SerdeError);
    }

    errors { 
        InternalError(t: String) {
            description("internal error")
            display("Internal error: '{}'",  t)
        }
    }
}