Add `rm-dups` script to remove duplicate downloads
Add `rm-dups` script to remove duplicate downloads

Scans a directory for filenames that match Chrom(e|ium)-style
incremented parenthesized numbers, then removes files whose SHA256 sums
indicate equality.

E.g.:

    $ pwd
    /home/bhaskell/Downloads

    $ ls -1
    Pizza (1).txt
    Pizza.txt

    ## Script just prints a script to be piped to `sh` (for inspection)
    $ rm-dups
    # dup of /home/bhaskell/Downloads/Pizza.txt
    rm  -v "/home/bhaskell/Downloads/Pizza (1).txt"

    ## Pipe it to actually remove files
    $ rm-dups | sh
    removed '/home/bhaskell/Downloads/Pizza (1).txt'

benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles