Fix #6 Support twitter handles in trader definition

```ruby
TRADER_TWITTER_HANDLES = {
    "NCB" => "@ncbja",
    "JMMB" => "@JMMBGROUP",
    "BNS" => "@ScotiabankJM",
    "JNBS" => "@JamaicaNational",
    "FGB" => "@First_Global",
    "Sagicore" => "@SagicorJa",
  }
```