[Qt] optimize PNG files
[Qt] optimize PNG files

- provide a python script
- add optimized png files

aspaas/ion,MinuteManReserve/mmr-core,aspaas/ion,aspaas/ion,MinuteManReserve/mmr-core,aspaas/ion,MinuteManReserve/mmr-core,MinuteManReserve/mmr-core,MinuteManReserve/mmr-core,aspaas/ion,aspaas/ion