add retro compatibility for config and explanations

config.example.php

@@ -1,14 +1,18 @@
 <?php
 /**
 * Repositories path is an array of ('repo name'=> 'repo path')
-* In this case the repo is in the same folder than the git-pretty-stats
-* More flexible than the repositories folder
+* In this case the repos are in the same folder than the git-pretty-stats
+* More flexible than the repositories folder 
+* Old system still working : 
+* return array(
+*  'repositoriesPath' => 'repositories'
+* );
 **/
 return array(
     'repositoriesPath' => array(
-        'repo-name'=>'../repo-path',
-        'repo-name2'=>'../repo-path2',
-        'repo-name3'=>'../repo-path3'
+        'repo-name' => '../repo-path',
+        'repo-name2' => '../repo-path2',
+        'repo-name3' => '../repo-path3'
         )
     );
 ?>

index.php

@@ -43,6 +43,10 @@
 
 function loadRepository ($app, $path) {
     $repositoryPath = $app['config']['repositoriesPath'][$path];
+    //trying the old-fashioned way for compatibility
+    if( !realpath($repositoryPath) ){
+        $repositoryPath = $app['config']['repositoriesPath'] . '/' . $path;
+    }
     try {
         $gitWrapper = new \PHPGit_Repository(__DIR__ . '/' . $repositoryPath);
         $repository = new Repository($gitWrapper);