Removing Dependency from SDK Core Project

- Copied files required for Rest API SDK
- Removed PPApiContext and directly connected APIContext with PPConfigManager
- Removed duplicate data storage of configuration and credentials.
- Code Style Fixes
- Remove build.xml file as it is not required anymore
- Updated the samples
- Updated the documentations

tests/PayPal/Test/Core/PPHttpConfigTest.php

@@ -0,0 +1,121 @@
+<?php
+use PayPal\Core\PPHttpConfig;
+/**
+ * Test class for PPAPIService.
+ *
+ */
+class PPHttpConfigTest extends PHPUnit_Framework_TestCase
+{
+   
+    protected $object;
+    
+    private $config = array(
+		'http.ConnectionTimeOut' => '30',
+		'http.Retry' => '5'	,    		
+    );
+
+    /**
+     * Sets up the fixture, for example, opens a network connection.
+     * This method is called before a test is executed.
+     */
+    protected function setUp()
+    {
+        
+    }
+
+    /**
+     * Tears down the fixture, for example, closes a network connection.
+     * This method is called after a test is executed.
+     */
+    protected function tearDown()
+    {
+    }
+
+    /**
+     * @test
+     */
+    public function testHeaderFunctions()
+    {  
+    	$o = new PPHttpConfig();
+    	$o->addHeader('key1', 'value1');
+    	$o->addHeader('key2', 'value');
+    	$o->addHeader('key2', 'overwritten');
+    	
+    	$this->assertEquals(2, count($o->getHeaders()));
+    	$this->assertEquals('overwritten', $o->getHeader('key2'));
+    	$this->assertNull($o->getHeader('key3'));
+    	
+    	$o = new PPHttpConfig();
+    	$o->addHeader('key1', 'value1');
+    	$o->addHeader('key2', 'value');
+    	$o->addHeader('key2', 'and more', false);
+    	 
+    	$this->assertEquals(2, count($o->getHeaders()));
+    	$this->assertEquals('value;and more', $o->getHeader('key2'));
+    	
+    	$o->removeHeader('key2');
+    	$this->assertEquals(1, count($o->getHeaders()));
+    	$this->assertNull($o->getHeader('key2'));
+    }
+    
+    /**
+     * @test
+     */
+    public function testCurlOpts()
+    {
+    	$o = new PPHttpConfig();
+    	$o->setCurlOptions(array('k' => 'v'));
+    	
+    	$curlOpts = $o->getCurlOptions();
+    	$this->assertEquals(1, count($curlOpts));
+    	$this->assertEquals('v', $curlOpts['k']);
+    }
+    
+    /**
+     * @test
+     */
+    public function testUserAgent()
+    {
+    	$ua = 'UAString';
+    	$o = new PPHttpConfig();
+    	$o->setUserAgent($ua);
+    	
+    	$curlOpts= $o->getCurlOptions();
+    	$this->assertEquals($ua, $curlOpts[CURLOPT_USERAGENT]);
+    }
+    
+    /**
+     * @test
+     */
+    public function testSSLOpts()
+    {
+    	$sslCert = '../cacert.pem';
+    	$sslPass = 'passPhrase';
+    	
+    	$o = new PPHttpConfig();
+    	$o->setSSLCert($sslCert, $sslPass);
+    	 
+    	$curlOpts= $o->getCurlOptions();
+    	$this->assertArrayHasKey(CURLOPT_SSLCERT, $curlOpts);
+    	$this->assertEquals($sslPass, $curlOpts[CURLOPT_SSLCERTPASSWD]);
+    }
+    
+    /**
+     * @test
+     */
+    public function testProxyOpts()
+    {
+    	$proxy = 'http://me:secret@hostname:8081';
+    	 
+    	$o = new PPHttpConfig();
+    	$o->setHttpProxy($proxy);
+    
+    	$curlOpts= $o->getCurlOptions();
+    	$this->assertEquals('hostname:8081', $curlOpts[CURLOPT_PROXY]);
+    	$this->assertEquals('me:secret', $curlOpts[CURLOPT_PROXYUSERPWD]);
+    	
+    	$this->setExpectedException('PayPal\Exception\PPConfigurationException');
+    	$o->setHttpProxy('invalid string');
+    }
+}
+?>