Add transakcio set type define, add set load [...]

Add transakcio set type definition, add set loading, move transakcio to
package, adapt branch to last master updates (fix compile due new common
types & git conflicts).
Update tests to pass the test, pending to adapt to new Transakcio
interface.

log/log.go

@@ -132,7 +132,7 @@ func Warnw(template string, kv ...interface{}) {
 
 // Errorw calls log.Errorw
 func Errorw(template string, kv ...interface{}) {
-	log.Fatalw(template, kv...)
+	log.Errorw(template, kv...)
 }
 
 // Fatalw calls log.Fatalw