Added Publisher.Version to enable comparisons in applications using this library

database.go

@@ -19,11 +19,11 @@ func newDatabase(host string, port int, dbName, user, pass string) (dbase Databa
 
 func (dbase Database) sqlConnString() string {// {{{
 	return fmt.Sprintf(
-		"postgresql://%s:%s@%s:%d/%s?sslmode=disable",
-		dbase.Username,
-		dbase.Password,
+		"host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
 		dbase.Host,
 		dbase.Port,
+		dbase.Username,
+		dbase.Password,
 		dbase.DbName,
 	)
 }// }}}

upgrader.go

@@ -28,6 +28,17 @@ func (upgrader *Upgrader) SetLogCallback(callback func(string, string)) {// {{{
 func (upgrader *Upgrader) SetSqlCallback(callback func(string, int) ([]byte, bool)) {// {{{
 	upgrader.sqlCallback = callback
 }// }}}
+// Version returns the current dbschema version for the given database name.
+func (upgrader *Upgrader) Version(dbName string) (version int, err error) {// {{{
+	dbase, found := upgrader.databases[dbName]
+	if !found {
+		err = fmt.Errorf("Database %s not previously added to the upgrader", dbName)
+		return
+	}
+
+	version, err = dbase.version()
+	return
+}// }}}
 
 func (dbase Database) createSchemaTable() (err error) {// {{{
 	dbase.upgrader.logCallback("create", fmt.Sprintf("%s, _db.schema", dbase.DbName))