Refactor AttributeMap to allow for data conversion
Refactor AttributeMap to allow for data conversion

We want to use an adapter pattern to convert between database and 
Salesforce formats for each field. By extracting our existing data 
conversion (ISO-8601 timestamp conversion for Dates/Times) into an 
adapter, we can much more easily drop in new adapters.
tablexi/restforce-db,skryl/restforce-db,tablexi/restforce-db,skryl/restforce-db,tablexi/restforce-db