Keybase client hangs waiting on key entry

Here's a log

```
$ keybase track max [18:14:11]
info: ...checking identity proofs
✔ public key fingerprint: 8EFB E2E4 DD56 B352 7363 4E8F 6052 B2AD 31A6 631C
✔ "maxtaco" on twitter: https://twitter.com/maxtaco/status/433688676975927296
✔ "maxtaco" on github: https://gist.github.com/8847250
✔ "maxtaco" on reddit: https://www.reddit.com/r/KeybaseProofs/comments/2clf9c/my_keybase_proof_redditmaxtaco_keybasemax/
✔ "maxtaco" on coinbase: https://coinbase.com/maxtaco/public-key
✔ "maxtaco" on hackernews: https://news.ycombinator.com/user?id=maxtaco
✔ admin of keybase.io via HTTPS: https://keybase.io/.well-known/keybase.txt
✔ admin of oneshallpass.com via HTTPS: https://oneshallpass.com/.well-known/keybase.txt
✔ admin of the DNS zone for oneshallpass.com
✔ admin of the DNS zone for maxk.org
✔ admin of the DNS zone for nutflex.com
Is this the max you wanted? [y/N] y
Permanently track this user, and write proof to server? [Y/n]

You need a passphrase to unlock the secret key for
user: "keybase.io/tel "
2048-bit RSA key, ID _, created 2014-09-23
(subkey on main key ID _)

```

and then it hangs indefinitely. This happens for most keybase requests.

Installed via `npm` and `brew install gpg2`

```
$ keybase version [18:17:23]
keybase (keybase.io CLI) v0.7.1
- node.js v0.10.28
- gpg (GnuPG) 2.0.26
- libgcrypt 1.6.2
Identifies as: 'keybase.io node.js client v0.7.1 darwin'
```

Reproduce the hang with `keybase track max` and review how the Node.js client invokes GPG during passphrase entry. Compare the behavior using the reported Node.js v0.10.28, GnuPG 2.0.26, and keybase v0.7.1 environment; done means key entry completes and the request no longer hangs indefinitely.

Written by the indexing model from the issue text.