WWTD
Merge pull request #16 from zendesk/bquorning/wwtd

Use wwtd instead of appraisals
Test with Rails 4
Merge remote-tracking branch 'origin/master' into ben/schema_dumper

Conflicts:
	global_uid.gemspec
checkpoint
Merge remote-tracking branch 'origin/bquorning/rails4' into ben/schema_dumper
upgrade to mysql2, fix tests
add test