Linux Permissions

Type octal notation "0644" and get back:
User: Read and Write
Group: Read
Others: Read

rw-r--r--

Future:
Right now I don't do anything with the special bit (the first one) so I would like to add support for that in later commits

I would also eventually like to add support for reverse octal notation, for example: 
rwx-rw-rw- to 0766