rename DVResource to Configuration
related #139
refactoring SentenceValidator constructor change Configuration to ValidatorConfiguration and CharacterTable, for remove SentenceIterator
introducing Factory class of SentenceValidator and SectionValidator
change SentenceValidator constructor to ValidatorConfiguration and CharacterTable instead of Configuration
minimum change Configuration to flatten
change class name to ValidatorConfiguration
move SentenceIteratorTest case to DocumentValidatorTest
fix no paragraph error bug
re-format code
remove SentenceIterator
add some Configuration test
add SentenceValidatorFactoryTest and SectionValidatorFactoryTest
split illegal args test case
Merge pull request #150 from johtani/configuration_refactoring_139

Refactoring Configuration Structure
fix checkstyle error
Merge pull request #154 from johtani/fix_tiny_checkstyle_error

fix checkstyle error