not to exit with status code 0 on '/etc/init.d/td-agent status', when daemon isn't running

fixes #22
v1.1.12 (deb)
libyaml 0-2 also for wheezy
Allow install on debian wheezy, which complains about patched files not being merged (quilt)
Change libssl version to 1.0.0, because 0.9.8 is unavailable on wheezy
Force selection of libyaml 0-2, because that line echoed libyaml 0-1 even after adding wheezy, for some reason that I have no time to investigate