T023 unique test T017 foreign key, dumper
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
Merge branch 'power_ruby_4_0_2' of https://github.com/PowerRuby/rails into power_ruby_4_0_2
double-up drop table schema_migration hack