This looks better for text-only viewing…

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

The text-only version should still be very readable, but the RST output
will be better hopefully.

0.1.8 was never documented in the NEWS file.

This is basically a hspace release, so the changelog is small.

Small updates to the documentation and make a new small release.

Also replace tabs in an older entry with spaces.