Add wrapper to more easiliy find Record Types

two issues here:
1. Record Type Ids can change between Salesforce environments (e.g. sandboxes vs production)
2. Record Type Developer Name does not change between environments, but is cumbersome to locate (requires a SOQL query)

proposed short-term solution:
create a convenience method, getRecordTypeIdByDeveloperName(), which surfaces Developer Names

proposed long-term solution:
replace existing RecordType handling (via "sobjectInfos") with DeveloperName handling