Cannot encode/decode UTF-8

Over the command line this fails, however doing this over the web interface this passes.

```
-> % cat snowman
Do you wanna build a ☃? Come on lets go and play I never see you anymore Come out the door It's like you've gone away- We used to be best buddies And now we're not I wish you would tell me why. Do you wanna build a ☃? It doesn't have to be a ☃..
```

```
-> % keybase encrypt -s blainesch snowman
You need a passphrase to unlock the secret key for
user: "keybase.io/blainesch "
4096-bit RSA key, ID 8B595CB9, created 2014-03-06 (main key ID 524B1779)
```

```
-> % keybase decrypt snowman.asc
You need a passphrase to unlock the secret key for
user: "keybase.io/blainesch "
4096-bit RSA key, ID E98BE3788B595CB9, created 2014-03-06
(subkey on main key ID 763CCD80524B1779)

Do you wanna build a ☃? Come on lets go and play I never see you anymore Come out the door It's like you've gone away- We used to be best buddies And now we're not I wish you would tell me why. Do you wanna build a ☃? It doesn't have to be a ☃..

info: Valid signature from you
```

Start by reproducing the issue with the command-line `keybase encrypt` and `keybase decrypt` commands using the provided `snowman` text, then compare this with the web-interface behavior. Done means UTF-8 characters such as the snowman survive CLI encryption and decryption without mojibake, while the valid signature remains intact.

Written by the indexing model from the issue text.