remove duplication in Object class
Merge pull request #74 from eitoball/remove_duplication_in_object_class

Remove duplication in Object class
correct typo in HeaderExtractor#get_association_class

This should fix #75.
Merge pull request #76 from eitoball/fix_issue_75

Correct typo in HeaderExtractor#get_association_class
Updated gemfile
Package release 3.1.1
Release 3.1.1
update gemfile lock files for 3.1.1
separate extractors
refactor Comma::DataExtractor to reduce complexity
Merge pull request #77 from eitoball/reduce_complexity_in_comma_data_extractor

Reduce complexity in Comma::DataExtractor
add support of data_mapper 1.2.0
add descriptions of special fields (__use__ and __static_column__)
Merge pull request #78 from eitoball/support_data_mapper

Add DataMapper support
Merge pull request #79 from eitoball/add_description_of_special_fields_in_readme

Add descriptions of __use__ and __static_column__ in README.markdown
[NEW] Add DataMapper support to the README
update rails to latest gem files
Merge pull request #80 from eitoball/update_rails_for_tests

Update rails to latest gem files