Add Code Climate badge to README
Fixed a bug that configure method does not work on RegexpParser
Fixed a bug in calling super
add pixel tracking
Merge pull request #237 from mrb/master

Add Code Climate badge to README
Merge pull request #244 from tomohisaota/fix-regexpparser

Fixed a bug that configure method does not work on RegexpParser
At submit_buffer, fixed writer selection makes throughput bottleneck.
Fix to select a writer by rough round-robin,
 * to reduce bottlenecks
 * not to reduce performance without locks

What is important is to select a different writer from previous submits, not to select "strictly next" writer.
That is why this patch doesn't include locks.
Merge pull request #245 from tagomoris/flush_threads_roundrobin

Select writer threads by round-robin
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
Add log_level option to each plugin
Replace  with log/@log to support log_level option
require sigdump
Merge pull request #256 from sonots/sigdump

Add sigdump
Merge pull request #255 from fluent/add-log-level-option

Add log_level option