[pass] Error if older version of tree is installed

[Mathias Renner]

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Hello everyone,

I joined this list since this seems to be the place to get in touch with
the community (I was looking for a bug report system - did not find any).

I suggest to include in the docs or setup pages, that to be able to run
`pass find` you need to have tree version 1.7.0 installed. Otherwise,
this command outputs an error.  Tree version 1.7.0 is at least not in
the repos for Fedora 20 and Ubuntu 14.04 LTS yet.
I had to download tree directly from the developers' website and compile
it manually: http://mama.indstate.edu/users/ice/tree/

Otherwise, I love pass, thank you guys for developing and maintaining it!!

- -- 
Mathias Renner
www.Mathias-Renner.de
 
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