update docs/fix nuller pkg

README.md

@@ -7,10 +7,10 @@ Types in `null` are treated like zero values in Go: blank string input will prod
 
 Types in `nuller` will only be considered null on null input, and will JSON encode to `null`. If you need zero and null be considered separate values, use these.
 
-All types implement `sql.Scanner`, so you can use this library in place of `sql.NullXXX`. 
+All types implement `sql.Scanner` and `driver.Valuer`, so you can use this library in place of `sql.NullXXX`. All types also implement: `encoding.TextMarshaler`, `encoding.TextUnmarshaler`, `json.Marshaler`, and `json.Unmarshaler`. 
 
 ### null.String
-A nullable string. Implements `sql.Scanner`, `encoding.Marshaler` and `encoding.TextUnmarshaler`, providing support for JSON and XML. 
+A nullable string.
 
 Will marshal to a blank string if null. Blank string input produces a null String. In other words, null values and empty values are considered equivalent. Can unmarshal from `sql.NullString` JSON input. 
 

nuller/int.go

@@ -1,4 +1,4 @@
-package null
+package nuller
 
 import (
 	"database/sql"

nuller/int_test.go

@@ -1,4 +1,4 @@
-package null
+package nuller
 
 import (
 	"encoding/json"

nuller/string.go

@@ -1,5 +1,6 @@
-// Package null provides an opinionated yet reasonable way of handling null values.
-package null
+// Package nuller contains types that consider zero input and null input as separate values.
+// Types in this package will always encode to their null value if null.
+package nuller
 
 import (
 	"database/sql"

nuller/string_test.go

@@ -1,4 +1,4 @@
-package null
+package nuller
 
 import (
 	"encoding/json"

string.go

@@ -1,4 +1,6 @@
-// Package null provides an opinionated yet reasonable way of handling null values.
+// Package null provides a convenient way of handling null values.
+// Types in this package consider empty or zero input the same as null input.
+// Types in this package will encode to their zero value, even if null.
 package null
 
 import (