Update NhacCuaTuiParser.py

Change condition to search for flash player.
Update ZingMP3Parser.py

Handle gzip encoding for mp3.zing.vn
Update NhacCuaTuiParser.py

Fix typo error when indent
Update NhacCuaTuiParser.py

Change from search for class_id to dev_id as suggested by thuandt
Merge pull request #6 from StanleyPham/master

Fix download issue with NhacCuaTui and ZingMp3