Improve type conversion performance by reducing key iteration
Added headers to record.
Added add_http_headers option.
Merge pull request #252 from RafaelSzefler/master

Added headers to record (in_http).
Add add_http_headers option test
Remove logging functionality from TextParsers
Merge pull request #254 from fluent/remove-global-log-from-parser

Remove logging functionality from TextParsers