Fix legacy constructors

These go way back to php 4 and don't need to be like this for any
reason. Currently error handling is acting up when these throw an
error.

airtime_mvc/application/cloud_storage/Amazon_S3StorageBackend.php

@@ -8,7 +8,7 @@ class Amazon_S3StorageBackend extends StorageBackend
     private $s3Client;
     private $proxyHost;
 
-    public function Amazon_S3StorageBackend($securityCredentials)
+    public function __construct($securityCredentials)
     {
         $this->setBucket($securityCredentials['bucket']);
         $this->setAccessKey($securityCredentials['api_key']);

airtime_mvc/application/cloud_storage/FileStorageBackend.php

@@ -2,11 +2,6 @@
 
 class FileStorageBackend extends StorageBackend
 {
-    //Stub class
-    public function FileStorageBackend()
-    {
-    }
-
     public function getAbsoluteFilePath($resourceId)
     {
         //TODO
@@ -32,4 +27,4 @@ class FileStorageBackend extends StorageBackend
     {
         return "";
     }
-}
+}

airtime_mvc/application/cloud_storage/ProxyStorageBackend.php

@@ -14,7 +14,7 @@ class ProxyStorageBackend extends StorageBackend
      * Receives the file's storage backend and instantiates the appropriate
      * object.
      */
-    public function ProxyStorageBackend($storageBackend)
+    public function __construct($storageBackend)
     {
         $CC_CONFIG = Config::getConfig();