Updated readme for -dir flag

Author: criticalsession

README.md

@@ -10,10 +10,16 @@ When executed, the program reads the specified file and creates a multipart/form
 
 Upon a successful upload, the program outputs the URL to the uploaded file to the console and also **writes it to the clipboard**.
 
+### Uploading multiple files
+
+When using `-dir` mode, the program will loop through all files in the directory provided and upload each one. Upon completing all uploads, the program will output a table with the files uploaded and the URL generated. This output will also be saved to a file in the source directory naned `upload.xxxxx.log`.
+
+The same functionality is available if more than one arg is provided (e.g. `npu file1.jpg file2.jpg`) but the log file will be stored in the executable's root directory.
+
 ## To do
 
-- [ ] Add support for multiple files
-- [ ] Add support for directories
+- [x] Add support for multiple files
+- [x] Add support for directories
 - [ ] Add support for archiving files (with encryption)
 - [ ] Add configuration file