WIP: Using OSX Keychain as backend

[moul]

Waiting for #10 for total rewrite, this is a working proof-of-concept

Speed is bad but we can think about using Keychain and .gauth file, so the user can choose between speed and improved-security.

cc @golimpio

[moul]

https://github.com/moul/alfred-workflow-gauth/pull/10#issuecomment-38708160

it looks good to me. I ran a few tests and it worked fine. It's a bit slower than the config file (like you said), but since it runs a command line for each key, it's expected to be slower any way. May be using the Using Python Keyring Lib would improve the performance, but it can be investigated for a next version, I think.

:+1:

[moul]

Too slow, we need to cache the list of keys and only call the slow resolver when asking specifically for a key