Add support for multiple versions test
Fix unsigned_decimal test
Remove lib/**/mysql2_adapter.rb
Remove duplicate files lib/**/v4_1/**/*.rb
v3 use v4 abstract_mysql_adapter.rb
Remove lib/**/abstract/schema_dumper.rb
Remove duplicate code
Support for activerecord 4.2
Add bigint primary_key support
Merge pull request #16 from kamipo/master

Add bigint primary_key support