fixed double slashes in getRelativePath()

Author: vs7

src/MagentoHackathon/Composer/Magento/Deploystrategy/Symlink.php

@@ -128,13 +128,19 @@ protected function _symlink($relSourcePath, $destPath, $absSourcePath)
      */
     public function getRelativePath($from, $to)
     {
+        // Can't use realpath() here since the destination doesn't exist yet
         $from = is_dir($from) ? rtrim($from, '\/') . '/' : $from;
         $to = is_dir($to) ? rtrim($to, '\/') . '/' : $to;
+
         $from = str_replace('\\', '/', $from);
         $to = str_replace('\\', '/', $to);
 
+        $from = str_replace(array('/./', '//'), '/', $from);
+        $to = str_replace(array('/./', '//'), '/', $to);
+
         $from = explode('/', $from);
         $to = explode('/', $to);
+
         $relPath = $to;
 
         foreach ($from as $depth => $dir) {