Serde based serialization support and misc utilities for working with Dynamodb via the rusoto_dynamodb crate.

Features:

API Example:

```rust use dynamodb_data::*; use std::collections::HashMap;

let payload: HashMap = fields!{ id => ::uuid::Uuid::newv4(), name => "user name", counter => 0 }; let getitemquery = rusotodynamodb::GetItemInput { key: fields!{ id => ::uuid::Uuid::new_v4() }, ..Default::default() }; ```

NOTE

The fields macro syntax has changed from fields!{a: b} to fields!{a => b}. Since It looks better for common cases like: rust fields!{ “:a” => ::some_module::fun(), }