ISO8601 and %z based timezones now fully supported.
Restructured so log lines are also only parsed once and return
a unixtime and a pattern match.
Fix all test cases to adjust for the change in return value.
This avoids duplication of code across fail2ban-regex and samples test
cases. This also now more neatly resolves the issue of double counting
date templates matches in fail2ban-regex.
In addition, the samples test cases now also print a warning message
that not all regexs have samples for them, with future plan to change
this to an assertion.