`Earth.init` is deprecated, use `require earth/:domain` instead.
Fixed syntax errors of sql
When the converter is set to alchemist, the value of weight is an
instance of Alchemist::NumericConversion. So we should convert it to a
float with the :sprintf.
Upgraded activerecord and activesupport to 3.2.12, and lock roo to version 1.10.1
Use the new api of minitest-reporters