InnValidator
1.9 symbol refactoring
add tests for slug_validator
Email validator
Merge pull request #24 from asiniy/refactoring-and-tests

Refactoring and tests
Merge pull request #25 from zabolotnov87/add_slug_tests

add tests for slug_validator
support for 2.1.0
Merge pull request #26 from asiniy/2.1.0

support for 2.1.0