Fix for specifying a directory in a package when deploying from windows (#73)

* Update finder to avoid using SplFileInfo getPath which causes issues on windows paths
* Add normalizeSeparators to Package
* Fix normalizeSeparators styling

Author: w00key

src/Package.php

@@ -304,6 +304,14 @@ public function getFilename()
         return "sidecar/{$this->packagingVersion()}-{$this->hash()}.zip";
     }
 
+    /**
+     * @return string
+     */
+    public function normalizeSeparators($file)
+    {
+        return str_replace(DIRECTORY_SEPARATOR, '/', $file);
+    }
+
     /**
      * @return string
      *
@@ -351,19 +359,19 @@ public function upload()
             // Remove the base path so that everything inside
             // the zip is relative to the project root.
             $zip->addFileFromPath(
-                $this->removeBasePath($file), $file, $options
+                $this->normalizeSeparators($this->removeBasePath($file)), $file, $options
             );
         }
 
         foreach ($this->exactIncludes as $source => $destination) {
             $zip->addFileFromPath(
-                $destination, $source, $options
+                $this->normalizeSeparators($destination), $source, $options
             );
         }
 
         foreach ($this->stringContents as $destination => $stringContent) {
             $zip->addFile(
-                $destination, $stringContent, $options
+                $this->normalizeSeparators($destination), $stringContent, $options
             );
         }