Merged FAD-3148 into 2.x

* FAD-3148 basic non-functioning base class

* FAD-3148 a bit more functionality in the base class

* FAD-3148 added custom promise class and custom response class. Did good things to SparkPost class

* Updated Transmission.php for new refactor, still WIP. Created Resource.php as a parent class for all future resources.

* Removed test functions

* Cleaned up Transmissions.php according to PSR-2, deleted more test code and comments.

* added sync and aysnc, cleaned up code

* added support for async/sync option

* added support for async/sync option

* Added interns to authors

* simplified the request function

* added comments

* added user agent

* added comments in SparkPostPromise

* added comments in SparkPostException

* added comments in SparkPostResponse

* cleaning up test

* updated composer.json and contributing files for testing

* Ran php-cs-fixer

* testing for sparkpost response class

* updated to newer version of guzzle

* updated to newer version of guzzle

* Cleaned up getUrl and other functions

* cleaned up constructor and overrode getCode with getResponse()->getStatusCode()

* fixed up then method

* cleaned up getBody

* deleted old test

* Wrote total coverage tests for SparkPost class

* commented out setting up transmissions endpoint until merging with FAD-3146

3 files changed, 14 insertions, 15 deletions

diff --git a/examples/transmission/send_with_bcc.php b/examples/transmission/send_with_bcc.php
index ce67862..7479c4a 100644
--- a/examples/transmission/send_with_bcc.php
+++ b/examples/transmission/send_with_bcc.php
@@ -36,8 +36,8 @@ try {
                     'email' => 'original.recipient@example.com',
                 ],
                 'substitution_data' => [
-                    'recipient_type' => 'Original'
-                ]
+                    'recipient_type' => 'Original',
+                ],
             ],
             [
                 'address' => [
@@ -45,8 +45,8 @@ try {
                     'header_to' => '"Original Recipient" <original.recipient@example.com>',
                 ],
                 'substitution_data' => [
-                    'recipient_type' => 'BCC'
-                ]
+                    'recipient_type' => 'BCC',
+                ],
             ],
         ],
     ]);
diff --git a/examples/transmission/send_with_cc.php b/examples/transmission/send_with_cc.php
index fa1d9e9..7ad2a7b 100644
--- a/examples/transmission/send_with_cc.php
+++ b/examples/transmission/send_with_cc.php
@@ -36,8 +36,8 @@ try {
                     'email' => 'original.recipient@example.com',
                 ],
                 'substitution_data' => [
-                    'recipient_type' => 'Original'
-                ]
+                    'recipient_type' => 'Original',
+                ],
             ],
             [
                 'address' => [
@@ -46,13 +46,13 @@ try {
                     'header_to' => '"Original Recipient" <original.recipient@example.com>',
                 ],
                 'substitution_data' => [
-                    'recipient_type' => 'CC'
-                ]
+                    'recipient_type' => 'CC',
+                ],
             ],
         ],
         'customHeaders' => [
-            'CC' => '"Carbon Copy Recipient" <cc.recipient@example.com>'
-        ]
+            'CC' => '"Carbon Copy Recipient" <cc.recipient@example.com>',
+        ],
     ]);
     echo 'Congrats! You sent an email with cc using SparkPost!';
 } catch (\Exception $exception) {
diff --git a/examples/unwrapped/create_transmission.php b/examples/unwrapped/create_transmission.php
index f19ee6e..d3a44c5 100644
--- a/examples/unwrapped/create_transmission.php
+++ b/examples/unwrapped/create_transmission.php
@@ -24,8 +24,8 @@ try {
             [
                 'address' => [
                     'email' => 'john.doe@example.com',
-                ]
-            ]
+                ],
+            ],
         ],
         'content' => [
             'from' => [
@@ -34,8 +34,8 @@ try {
             ],
             'html' => '<p>Hello World!</p>',
             'text' => 'Hello World!',
-            'subject' => 'Example Email'
-        ]
+            'subject' => 'Example Email',
+        ],
     ];
     $results = $sparky->transmissions->create($message);
     echo 'Congrats! You sent a message using SparkPost!';
@@ -44,4 +44,3 @@ try {
     echo $exception->getAPICode()."\n";
     echo $exception->getAPIDescription()."\n";
 }
-