[bridges] migrate all bridges to an array based definition of parameters

see github issue 356

Signed-off-by: Pierre Mazière <pierre.maziere@gmx.com>

bridges/ElsevierBridge.php

@@ -7,16 +7,14 @@ class ElsevierBridge extends BridgeAbstract{
 		$this->uri = 'http://www.journals.elsevier.com';
 		$this->description = 'Returns the recent articles published in Elsevier journals';
 
-		$this->parameters[] =
-			'[
-				 {
-					 "name" : "Journal name",
-					 "identifier" : "j",
-					 "required" : true,
-					 "exampleValue" : "academic-pediatrics",
-					 "title" : "Insert html-part of your journal"
-				 }
-			 ]';
+        $this->parameters[] = array(
+          'j'=>array(
+            'name'=>'Journal name',
+            'required'=>true,
+            'exampleValue'=>'academic-pediactrics',
+            'title'=>'Insert html-part of your journal'
+          )
+        );
 	}
 
 	// Extracts the list of names from an article as string