Update to latest plucky.
Get all gemfiles on the same page.
Fix test name conflict.
Prefer && to and.
Prefer parenthesis when using assignment and || over or.
Minor: extra whitespace removed.
Release lookout-mongo_mapper v.0.12.1

 - with EmbeddedDocument workaround, other changes from HEAD
 - also updates plucky dependency to 0.6.3, mongo deps to 1.8.x