added ruleType so outside sources can know the type for this rule

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDS/Protocols/FormFieldable.swift

@@ -72,16 +72,23 @@ public protocol Rule<ValueType> {
     func isValid(value: ValueType?) -> Bool
     /// Error Message to be show if the value is invalid.
     var errorMessage: String { get }
+    /// type of rule
+    var ruleType: String { get }
+}
+
+extension Rule {
+    public var ruleType: String { "\(Self.self)" }
 }
 
 /// Type Erased Rule for a specific ValueType.
 public struct AnyRule<ValueType>: Rule {
     private let _isValid: (ValueType?) -> Bool
-
+    public var ruleType: String
     public let errorMessage: String
 
     public init<R: Rule>(_ rule: R) where R.ValueType == ValueType {
         self._isValid = rule.isValid
+        self.ruleType = rule.ruleType
         self.errorMessage = rule.errorMessage
     }