some work on #375, put the runtime files in our config directory.
some work on #375, put the runtime files in our config directory.

this seems safer than in /tmp where others can tamper.

keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client