Pass index extension

[Zack]

Hi,

I added a pass extension that speeds up search a lot. It creates an index file where you can easily grep / search for matching entries. Works a lot faster.
It is implemented in a way, that you should use an alias pass=pass index in order to avoid a stale index file.

It should work on all supported OSs, but was mainly tested on macos.

have a look here: https://github.com/sboesebeck/pass-index

Cheers,

Stephan