manually merged Gemfile.lock
bumped the version to 3.0.0.3.3
[#57805658] Refactored create_search and the persistor
[#57805658] refactored persistor#[] method
bumped the version to 3.0.0.5.0
add doc comment for additional parameter
Merge pull request #209 from ke4/57805658_fix_search_in_multithreading_environment

57805658 fix search in multithreading environment