How to query coins that have more that one word in the name?

Hi, First thank you for sharing the library. 

I would like to know how to search data for crypto currencies like Leverage Coin with symbol (LVG)?

The API returns a 404

Eg:
```
coin_details = api.getCoinDetails(c.coin_name.downcase.parameterize)
 => {"status"=>404, "error"=>{}} 
```