Added initial version of collectd input plugin.
Removed unnecessary default codec.
Updated several areas to address the concerns expressed.  Please see the diffs for more info.
Fixed indents on collectd config sample.
Fixed required (was missing ‘d’)
Fixed typesdb_path to be typesdb array of potential files.
Changed a few variable names per advice from @jordansissel
Updated Makefile to pull types.db from collectd source.
Updated collectd.rb to use jar-based types.db if none specified in config.
Corrected file read to ignore empty lines.
Fixed indentation error.
Updated documentation a bit.
Merge pull request #785 from untergeek/master

Add collectd input plugin.
Merge git://github.com/logstash/logstash