Installation instructions point to edge (for now)
Don't reset current_scope to default scope if not explicitly set
Gemfiles
Thrift options

Vague possibility of helping with the Travis build
Make sure there isn't any more interesting log we can look at in Travis
support for dependent: :destroy, resolves #34
use after_destroy hooks for dependent: destroy and delete; raise error if invalid option
Don't allow unrecognized options to `has_many`
Attribution
Fail faster when test suite fails
execute :destroy callbacks directly, avoid n+1 w/ dependent: :destroy
make spec wording more consistent