0.5

Since version 0.4, I have made a lot of excellent changes that were much needed. Most importantly, I first fixed the bug of DFM exiting when selecting a non-existent file or directory. Now, DFM just returns to the prompt. I also improved the code indentation. The help message is now more detailed and includes all of the options. I fixed another bug of useless code. I was also finally able to add support for the tilde key. Finally, I updated the README's usage instructions.