Log: duplicate record and message before emit to work with destructive operations
out_forward does nothing if buffer chunk is empty [#126]
out_forward: it's not EventStream but BufferChunk
Merge pull request #124 from y-ken/master

The Problems I have found for lib/fluent/parser.rb
fix warn log message to have same string for same kind of warnings (for ease to supress duplicate log messages)
Merge pull request #127 from tagomoris/emit_failed_log

fix warn log message to have same string for same kind of warnings