Added custom validator check for constructing the proptypes for validation

For now will be ignored.
Possible future behavior:
  - Import structured validator that plugs into eslint-plugin-react to validate
     itself and it's children

Author: CalebMorris

lib/rules/prop-types.js

@@ -18,6 +18,7 @@ module.exports = function(context) {
 
   var configuration = context.options[0] || {};
   var ignored = configuration.ignore || [];
+  var customValidators = configuration.customValidators || [];
 
   var componentList = new ComponentList();
 
@@ -72,6 +73,15 @@ module.exports = function(context) {
     return ignored.indexOf(name) !== -1;
   }
 
+  /**
+   * Checks if prop should be validated by plugin-react-proptypes
+   * @param {String} validator Name of validator to check.
+   * @returns {Boolean} True if validator should be checked by custom validator.
+   */
+  function hasCustomValidator(validator) {
+    return customValidators.indexOf(validator) !== -1;
+  }
+
   /**
    * Checks if the component must be validated
    * @param {Object} component The component to process
@@ -203,6 +213,15 @@ module.exports = function(context) {
    *    the property is declared without the need for further analysis.
    */
   function buildReactDeclarationTypes(value) {
+    if (
+      value &&
+      value.callee &&
+      value.callee.object &&
+      hasCustomValidator(value.callee.object.name)
+    ) {
+      return true;
+    }
+
     if (
       value.type === 'MemberExpression' &&
       value.property &&