Typing fix

Rather esoteric, but fixes a warning

More safe guards

Minor bug fixes (including a segfault for missing parameters) and two options:
-m for multiple copies of the parameters
-P for rotating to a given position

the one about the random filesystem

C++ filesystem traversal is "random", as in Unix semantics, naughty naughty.
this isn't a problem unless you want to use -R or -N

this release fixes that, ordering recursive traversals in alphabetical order.

standard input anyone ?

stunningly enough, -l didn't have any special case for recognizing - as standard input.

this makes rr more usable as a pipe end...

-D is for recursive dirs

A new option, a bit strange: I found out I had some directories I wanted to randomize (they contain vacation pictures) and the hierarchy isn't uniform.

Using something like rr -n2 -D diapo
does exactly the trick!

-d is for dashdash

Turns out ending the list of params with '--' sometimes is not enough, because I lose the
special meaning of -- to end options.

So rr diapo -- *
is not enough to stop options that appear in *.

By default, passing -- to the command makes sense (most commands do take -- correctly).

Provide -d if that's not a good idea (delete dashdash)

new option

-R stands for "rotate". This is a "shuffle light", just rotate the actual arguments starting... somewhere, because sometimes you want to keep the order, BUT start anywhere.

binutils is trash

2.8

Update LICENSE

the one with -s

new option: -s start
minor optimization for -1 (no need to shuffle everything)

much better error handling

especially wrt reading directories