Keybase commandline client ignores TERM

It seems as though he keybase commandline client hard-codes colour codes instead of using terminfo or curses to achieve coloured output.

For example, trying to inhibit colours using the following fails:

```
TERM=dumb keybase id loke
```

This issue causes garbage output on terminals which does not support vt102-style codes.

Start with the keybase id command and reproduce the issue using TERM=dumb. Trace where its coloured output is generated and determine how terminal capabilities are checked; done means terminals without VT102-style support no longer receive garbage colour codes.

Written by the indexing model from the issue text.