Updated User Agent & More Samples for Billing Plans

- Fixed versioning in User Agent.
- Updated Billing Plan sample to update Payment definitions
- Docs & Tests

sample/doc/payments/CreatePaymentUsingPayPal.html

@@ -19,26 +19,26 @@ information</p></div></div><div class="code"><div class="wrapper"><span class="h
 <span class="hljs-variable">$item1</span>-&gt;setName(<span class="hljs-string">'Ground Coffee 40 oz'</span>)
     -&gt;setCurrency(<span class="hljs-string">'USD'</span>)
     -&gt;setQuantity(<span class="hljs-number">1</span>)
-    -&gt;setPrice(<span class="hljs-string">'7.50'</span>);
+    -&gt;setPrice(<span class="hljs-number">7.5</span>);
 <span class="hljs-variable">$item2</span> = <span class="hljs-keyword">new</span> Item();
 <span class="hljs-variable">$item2</span>-&gt;setName(<span class="hljs-string">'Granola bars'</span>)
     -&gt;setCurrency(<span class="hljs-string">'USD'</span>)
     -&gt;setQuantity(<span class="hljs-number">5</span>)
-    -&gt;setPrice(<span class="hljs-string">'2.00'</span>);
+    -&gt;setPrice(<span class="hljs-number">2</span>);
 
 <span class="hljs-variable">$itemList</span> = <span class="hljs-keyword">new</span> ItemList();
 <span class="hljs-variable">$itemList</span>-&gt;setItems(<span class="hljs-keyword">array</span>(<span class="hljs-variable">$item1</span>, <span class="hljs-variable">$item2</span>));</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="additional-payment-details">Additional payment details</h3>
 <p>Use this optional field to set additional
 payment information such as tax, shipping
 charges etc.</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$details</span> = <span class="hljs-keyword">new</span> Details();
-<span class="hljs-variable">$details</span>-&gt;setShipping(<span class="hljs-string">'1.20'</span>)
-    -&gt;setTax(<span class="hljs-string">'1.30'</span>)
-    -&gt;setSubtotal(<span class="hljs-string">'17.50'</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="amount">Amount</h3>
+<span class="hljs-variable">$details</span>-&gt;setShipping(<span class="hljs-number">1.2</span>)
+    -&gt;setTax(<span class="hljs-number">1.3</span>)
+    -&gt;setSubtotal(<span class="hljs-number">17.50</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="amount">Amount</h3>
 <p>Lets you specify a payment amount.
 You can also specify additional details
 such as shipping, tax.</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$amount</span> = <span class="hljs-keyword">new</span> Amount();
 <span class="hljs-variable">$amount</span>-&gt;setCurrency(<span class="hljs-string">"USD"</span>)
-    -&gt;setTotal(<span class="hljs-string">"20.00"</span>)
+    -&gt;setTotal(<span class="hljs-number">20</span>)
     -&gt;setDetails(<span class="hljs-variable">$details</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="transaction">Transaction</h3>
 <p>A transaction defines the contract of a
 payment - what is the payment for and who