phi failure detector off
add phi_failure_detector option
NodeConfig
Apply Fluentd style
Use Registry class for TextParser parsers

From this change, we can load 3rd party parser which
located in fluent/plugin/parser_xxx.rb automatically.
Merge pull request #299 from fluent/use-registry-for-parser-management

Use Registry class for TextParser parsers
Merge pull request #285 from sonots/phi_failure_detector_off

Add an option to turn off phi failure detector
Add 'test_' prefix to test files
fix to overwrite correctly bool configuration params with default true value by false value specified by configuration
Should use 'e.backtrace', not 'e'. refs #289
Print warn message when flush_at_shutdown is false in buf_memory. refs #286
Merge pull request #300 from fluent/add-warn-for-flush_at_shutdown-buf_memory

Print warn message when flush_at_shutdown is true in buf_memory. refs #286
v0.10.46
Add dummy log device and fix to use it
 * remove setting global logger in lib/fluent/test.rb
   * developer cannot understand when this assignment happen
   * global logger assignment exists in test/helper
 * dummy logger should contain messages that logger writes
   * to assert logger's output from core/plugin tests
 * test dummy logger is set in default in create_driver
   * to test logger message in configure
Merge pull request #308 from tagomoris/test_dummy_logger

Add dummy log device and fix to use it
Update travis.yml
Merge pull request #311 from sonots/travis_2.1

Update travis.yml
add option to show logs with source host/addr/port and its tag when large chunk arrived
Fix log typo, and tests
 * We cannot determine when data chunk is processed over send_data
   * On high load host, background I/O handler doesn't wake up long time.
   * "sleep" approach is not deterministic
 * Call Plugin#on_message directly to execute event processing on current thread
fix variable name for consistency