v0.1.7

This release adds the ability for catatonit to be used as the only
process in a pause container, by passing the -P flag (in this mode no
subprocess is spawned and thus no signal forwarding is done).

Thanks to the following people for making this release possible:

 * Aleksa Sarai <cyphar@cyphar.com>
 * Giuseppe Scrivano <gscrivan@redhat.com>

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>