* add logfile option in template

* add logfile parameters to init.pp and params.pp

Logfile for windows will be in install Directory. On linux systems logfile option will be empty to allow
logging to STDERR and transport to journald.

* Fix typo in logfile parameter

Align the name of this parameter with option as it should be in
`telegraf.conf`.

🐛 #58.

* Include missing metadata-json-lint gem

* fix fatal linter error

* Add single_section to input plugins (#41)

Single-bracket directives are required for certain sorts of input plugin
options, e.g. setting tags on that input plugin. This adds a
single_section template and directive (via @kkzinger 's solution, ty!),
as well as tests and updated docs with an example.

… config files (#66)

…atch size, and update buffer limit default to current telegraf default (#63)

* make it work with newer puppetlabs-apt

* add support for metric batch size

* telegraf uses 10000 as default for metric_buffer_limit so puppet should probably do that as well

Update the comment around `metric_batch_size` and
`metric_buffer_limit` to reflect revised behaviour.

Also remove deprecated parameter `flush_buffer_when_full`.

cf. https://github.com/influxdata/telegraf/blob/master/CHANGELOG.md#v013-2016-05-11

Also include AUTHORS summarising contributors to this module.