To make bashmark compatible with files

[friday-james]

Thanks for the excellent project. This is precisely what I need! I made a minor change to fit my daily needs. Hope it helps <3
Please feel free to leave comments or edit the PR.

Now it will not only save directories but also files in bashmarks

Example usage:

cd ~/Projects
touch awesome.sh
s awesome awesome.sh # The file is saved as a bashmarks
g awesome # Open the file