Document the two public structures

[Andy Alt]

These public structs should be documented

configster/src/lib.rs

Lines 5 to 15 in 96ab97d

 #[derive(Debug, PartialEq)] 
 pub struct Value { 
     pub primary: String, 
     pub attributes: Vec<String>, 
 } 
  
 #[derive(Debug, PartialEq)] 
 pub struct OptionProperties { 
     pub option: String, 
     pub value: Value, 
 }