Call original type_to_sql
Add alias_method_chain
Fix method name
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 #15 from winebarrel/call_original_type_to_sql

Call original type_to_sql when signed
Revert "Call original type_to_sql when signed"
Merge pull request #17 from waka/revert-15-call_original_type_to_sql

Revert "Call original type_to_sql when signed"
Merge pull request #16 from kamipo/master

Add bigint primary_key support
up to 0.3.0
Merge pull request #18 from waka/bump_up_0.3.0

up to 0.3.0