- detecting of file/directory name and id3 tag implemented
- layout of directory view now show correct filename in correct encoding
Method to solve Big5/GB2312/UTF-8 in same place:
1. get the string, which can be filename, directory name or id3 tag field
2. assume it is GB2312 encoding, convert it to UTF-8
3. assume the output is UTF-8, convert the output back to GB2312
4. if final output string is same as the original one, it is GB2312 encoding
5. repeat the process with Big5 instead of GB2312
6. if still different, it maybe UTF-8 encoding originally, just use it
