Enabled Billing Plans and Agreements APIs

- Added API Classes, Samples, and Tests
- Updated Functional Tests
- Updated Documentation with new SDK Name
- Updated Few Samples to use newer nicer result page

lib/PayPal/Api/CreditCardList.php

@@ -3,7 +3,6 @@
 namespace PayPal\Api;
 
 use PayPal\Common\PPModel;
-use PayPal\Rest\ApiContext;
 
 /**
  * Class CreditCardList
@@ -12,7 +11,7 @@ use PayPal\Rest\ApiContext;
  *
  * @package PayPal\Api
  *
- * @property \PayPal\Api\CreditCard credit_cards
+ * @property \PayPal\Api\CreditCard[] credit_cards
  * @property int count
  * @property string next_id
  */
@@ -20,9 +19,8 @@ class CreditCardList extends PPModel
 {
     /**
      * A list of credit card resources
-     * 
      *
-     * @param \PayPal\Api\CreditCard $credit_cards
+     * @param \PayPal\Api\CreditCard[] $credit_cards
      * 
      * @return $this
      */
@@ -42,6 +40,36 @@ class CreditCardList extends PPModel
         return $this->{"credit-cards"};
     }
 
+    /**
+     * Append CreditCards to the list.
+     *
+     * @param \PayPal\Api\CreditCard $creditCard
+     * @return $this
+     */
+    public function addCreditCard($creditCard)
+    {
+        if (!$this->getCreditCards()) {
+            return $this->setCreditCards(array($creditCard));
+        } else {
+            return $this->setCreditCards(
+                array_merge($this->getCreditCards(), array($creditCard))
+            );
+        }
+    }
+
+    /**
+     * Remove CreditCards from the list.
+     *
+     * @param \PayPal\Api\CreditCard $creditCard
+     * @return $this
+     */
+    public function removeCreditCard($creditCard)
+    {
+        return $this->setCreditCards(
+            array_diff($this->getCreditCards(), array($creditCard))
+        );
+    }
+
     /**
      * A list of credit card resources
      *
@@ -69,7 +97,6 @@ class CreditCardList extends PPModel
 
     /**
      * Number of items returned in each range of results. Note that the last results range could have fewer items than the requested number of items.
-     * 
      *
      * @param int $count
      * 
@@ -93,7 +120,6 @@ class CreditCardList extends PPModel
 
     /**
      * Identifier of the next element to get the next range of results.
-     * 
      *
      * @param string $next_id
      *