We add a auto-delete feature in database resource management. each thread which called DatabaseResource::database() before will emit a
QThread::finished() signal, the DatebaseResource class will catch this signal, and delete every thread-owned database resources
belongs to this thread.
* pS, a qt-5.1.0 and qt-5.2.1 difference-bug has been sloved.
Thranlation ZH-cn complete
add auto-start method