Add support for all the flags

[supercrabtree]

Many requests for flag support, so that peeps can use it just like ls

[supercrabtree]

All Flags (from http://linux.die.net/man/1/ls)

Supported

-a, --all
-A, --almost-all
-d, --directory
-h, --human-readable
--help

Extra (no in ls)

--no-vcs do not get VCS status (much faster)
-n don't show directorys

ToDo

--author
-b, --escape
--block-size=SIZE
-B, --ignore-backups
-c
-C
--color[=WHEN]
-D, --dired
-f
-F, --classify
--file-type
--format=WORD
--full-time
-g
--group-directories-first
-G, --no-group

--si
-H, --dereference-command-line
--dereference-command-line-symlink-to-dir
--hide=PATTERN
--indicator-style=WORD
-i, --inode
-I, --ignore=PATTERN
-k
-l
-L, --dereference
-m
-n, --numeric-uid-gid
-N, --literal
-o
-p, --indicator-style=slash
-q, --hide-control-chars
--show-control-chars
-Q, --quote-name
--quoting-style=WORD
-r, --reverse
-R, --recursive
-s, --size
-S
--sort=WORD
--time=WORD
--time-style=STYLE
-t
-T, --tabsize=COLS
-u
-U
-v
-w, --width=COLS
-x
-X
-1
--lcontext
-Z, --context
--scontext
--help
--version

[maelp]

The -h options requires numfmt, but the documentation does not say how to install it, perhaps it could be added

On osX, brew install coreutils installs gnumfmt, so a fix would be to detect whether numfmt exists or use gnumfmt on Darwn

[chrstphrknwtn]

@maelp I added checks for gnumfmt in c08c3d3, and I've just added notes to the readme for installing gnumfmt on OS X / Darwin with homebrew in 242a704 - excellent suggestion.