Better documentation

Signed-off-by: Kasper Grubbe <kawsper@gmail.com>
Let the user override the unicorn.stderr.log-placement for the unicorn.log-task

Signed-off-by: Kasper Grubbe <kawsper@gmail.com>
Bump to version 0.0.3

Signed-off-by: Kasper Grubbe <kawsper@gmail.com>