Refactor RecordConfig: Add getters/setters (#314)

* Replace RecordConfig.Name and .NameFQDN with getters and setters.
* Replace RecordConfig.Target with getters and setters.
* Eliminate the CombinedTarget concept.
* Add RecordConfig.PopulateFromString to reduce code in all providers.
* encode and decode name.com txt records (#315)
* Replace fmt.Errorf with errors.Errorf

providers/namedotcom/namedotcomProvider.go

@@ -11,6 +11,7 @@ import (
 
 const defaultAPIBase = "api.name.com"
 
+// NameCom describes a connection to the NDC API.
 type NameCom struct {
 	APIUrl  string `json:"apiurl"`
 	APIUser string `json:"apiuser"`