add OS X unique commands

[qinyuhang]

add OS X unique commands such as shasum5.16 shasum5.18 perl5.16(for
shasum in OS X )

[jeffcox]

👍 Would love to see this merged.

[Tatsh]

OS X does not come with 7z.

Did you test this out? Only GNU coreutils typical behaviour is checked.

[qinyuhang]

Sorry OS X not come with 7z, that is I imaged, but I tested perl series, shasum series, unzip & zip, md5, and it works.

[Tatsh]

Okay well, perl is extremely generic. Perl may do I/O (as it appears shasum is a Perl script?) that progress may see, but then you might as well have any script interpreter that comes with OS X, namely ruby, php, python.

Also, unzip and zip by default show progress. You have to pass -q to make them quiet.