Terra Binding for CosmWasm Contracts

How to use querier

``` use cosmwasmstd::Coin; use terrabindings::TerraQuerier;

let res: Coin = TerraQuerier::new(&deps.querier).query_swap(offer.clone(), ask)?; ```

How to use msg creator

``` use cosmwasmstd::CosmosMsg; use terrabindings::{createswapmsg, TerraMsgWrapper};

let msg: CosmosMsg = createswapmsg(contractaddr, offercoin, ask_denom); ```