Merge pull request #118 from burzum/develop

Develop
Merge pull request #120 from burzum/develop

Fixing https://github.com/CakeDC/utils/issues/102
Merge pull request #121 from burzum/develop

Develop
Skip empty rows.
Test for skip empty lines import.
Removed unnecessary comment, use Hash instead of Set.
Use Hash instead of Set
Merge pull request #125 from redd/develop

Use Hash instead of Set
Fixing https://github.com/CakeDC/utils/issues/82 SoftDeleteBehavior: Methods disable runtime