Fixed warning of test of in_object_space by the reinitialized constant

Signed-off-by: Tsuyoshi Ozawa <ozawa.tsuyoshi@gmail.com>
Merge pull request #162 from oza/fix-in_object_space-test-warning

Fixed warning of test of in_object_space by the reinitialized constant
Modify .travis.yml to test v11 branch
Merge pull request #172 from makimoto/fix-travis-yml-for-v11

Modify .travis.yml to test v11 branch
backport config dsl from v11
missed to fix test
fix to return self after instance_eval
Merge pull request #177 from sabottenda/fix_eval_dslparser

fix to return self after instance_eval
Goodbye incomprehensible code indent! Yay!!
Add format option to in_exec plugin
Improve in_exec test
Fix copy and paste invalid name of GCStat test
Use Fluent::ExecUtil parsers instead of own Parser in out_exec_filter
Remove 1.9.2 test because 1.9.2 is dead
Skip nil record at input and engine. fixes #176
v0.10.37
Remove buf_file require to avoid calling  nil situation
v0.10.38
fix to actually copy records in out_copy
fix to specify class name because BasicObject does not have Kernel methods