some cleaning and PSR-4

Author: Tino Ehrich

composer.json

@@ -2,7 +2,10 @@
     "name": "iron-io/iron_core",
     "type": "library",
     "description": "Collection of common functions for all iron.io client libraries",
-    "keywords": ["iron_core","iron"],
+    "keywords": [
+        "iron_core",
+        "iron"
+    ],
     "homepage": "http://github.com/iron-io/iron_core_php",
     "license": "MIT",
     "authors": [
@@ -17,18 +20,18 @@
             "email": "[email protected]",
             "homepage": "http://iron.io",
             "role": "Developer"
+        },
+        {
+            "name": "Tino Ehrich",
+            "email": "[email protected]"
         }
     ],
     "require": {
         "php": ">=5.2.0"
     },
     "autoload": {
-        "classmap": ["IronCore.class.php"]
-    },
-    "repositories":[
-        {
-            "type":"git",
-            "url":"http://github.com/iron-io/iron_core_php"
+        "psr-4": {
+            "IronCore\\": "src/"
         }
-    ]
+    }
 }

src/HttpException.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace IronCore;
+
+/**
+ * HttpException
+ *
+ * The Http_Exception class represents an HTTP response status that is not 200 OK.
+ *
+ * @package IronCore
+ * @author Tino Ehrich ([email protected])
+ */
+class HttpException extends \Exception
+{
+    const NOT_MODIFIED = 304;
+    const BAD_REQUEST = 400;
+    const NOT_FOUND = 404;
+    const NOT_ALLOWED = 405;
+    const CONFLICT = 409;
+    const PRECONDITION_FAILED = 412;
+    const INTERNAL_ERROR = 500;
+    const SERVICE_UNAVAILABLE = 503;
+    const GATEWAY_TIMEOUT = 504;
+}