Logstash modul and templates extended to load custom plugins
worker threads parameter added for Logstash module
worker threads parameter added for Logstash module
add doc. and validation of plugins parameter
Split plugins configuration from instance

Use a dedicated definition to configure plugins individually. This allows
greater flexibility and allows adding independent plugins setup from distinct
puppet code.
fix logstash plugins directories
Fix checks in logstash module
logstash::config: fix trailing whitespaces
further fix existing tests
Linting and disable 80chars check
Merge pull request #11 from ckaenzig/ltchw-changes

Logstash plugins support + configurable nb workers