Optional arguments to positional arguments.

The plan was to acquire auth_token , zabbix trigger status and zabbix
trigger severity from dedicated positional argument and optional
arguments. However, due to zabbix implementation, arguments were
strictly limited to 'To', 'Subject', 'Message'. Therefore, these
information are now put in 'Subject' positional arguments as a comma
separated values.
Merge pull request #2 from daniel-star/optional-arguments-to-positional-arguments

Optional arguments to positional arguments.