Merge pull request #22 from siesta/master

Postgresql Dialect: fix primary tag for int types
Add test for float64 precision
Remove unnecessary output in tests
Add scripts to test all dialects
Refactor isBlank method
Test use int as primary key
Use method DB() to get database connection handle
Remove method SetPool() in favour of sql package's builtin method, Use
it like this `db.DB().SetMaxIdleConns(10)`

So gorm don't need to care about compatibility problems, and you could
use latest `database/sql` features from latest releases without waiting gorm's support
Fix postgres primary key sql tag
* fix race condition
Use safe map to fix data race
Better compatibility for Updates
Show errors except RecordNotFound error by default for easy debug
Don't show unnecessary error messages when run tests
Include filename with linenum when show error message for easy debugging
Add RecordNotFound tests for method Related
ignore error `sql: Scan error on column index...`
fix parameter ordering for mysql / postgresql

where … group … having … order .. limit .. offset
Remove typo from DB access example in README
Merge pull request #32 from akuseru/master

fix parameter ordering for mysql / postgresql