Decrease max file size for uploads to 5MB (#134)

Reduce maximum file size limit from 10MB to 5MB.

Author: aln730

gallery/templates/view_dir.html

@@ -252,7 +252,7 @@ <h4 class="modal-title">Upload</h4>
             uploadMultiple: false,
             autoProcessQueue: false,
             parallelUploads: 3,
-            maxFilesize: 10 * 1024,
+            maxFilesize: 5 * 1024,
             chunking: true,
             forceChunking: true,
             chunkSize: 10 * 1024 * 1024,