Return query error in FirstOrInit and FirstOrCreate
Fix exception for FirstOrCreate when search condition is nil
Fix tests with go v1.3
Add Compatibility Mode
Support upcase column names
Support slice of pointers
Update README
Fix error when deploying to google app engine

github.com/jinzhu/gorm/postgres.go:103:21: composite struct literal database/sql.NullString with unkeyed fields
Don't set primary key is alrady exists
Merge pull request #163 from jimbao/master

Fix error when deploying to google app engine