Request List function

[gjrtimmer]

Request List Function:

func (...) List() []Type {}
func (...) ListString() []string {}

[gjrtimmer]

Submitted PR

[alvaroloes]

Thank you very much @GJRTimmer. I didn't see your PR so I checked your fork and added what you proposed with slight differences:

• The method for getting the values of the enums as a slice is called <Enum>Values() instead of "List"
• The method to check if a value belongs to the enum is called belongsTo<Enum>() (instead of "isValid") and it is a member of the type.
• I didn't add the method to get the values as an array of strings (too specific, I try to add as few things as possible). It can be obtained from the values array.

Check the latest version to see the changes ;-)

Again thanks a lot!