Don't stop on error

[AlexArgoAi]

When attempting to print a directory, an error is returned. ([bat error]: Is a directory (os error 21)).
It would be nice if, when given multiple files, bat would then just move on to the next file.

To reproduce:

$ mkdir foo_dir
$ echo foo > foo_file
$ cat * 2> /dev/null
foo
$ bat * 2> /dev/null
$

[sharkdp]

This seems to be a slightly different instantiation of #17. Thanks for reporting.

[sharkdp]

Closing this in favor of #17.