Specify UTF-8 charset in endurance-plot HTML output
Refactor search for free index

Keep sanely named snapshot_index variable for future use.
Update endurance-snapshot for journalctl from systemd 208

We're now also able to dump only that part of the journal relevant to
the snapshot being captured.
Don't fail whole snapshot parsing when journal parsing fails
Support parsing both formats of journalctl json output
Merge pull request #6 from xhaakon/master

Fix journal collection and parsing after systemd 208 update