Replace underscores with spaces when parsing metadata from filename
Use the metadata obtained from the filename, if another one is not available
Fix function name in comment
Don't modify the filename, change only the Artist and Title fields
Fix comment
Fix typo in comment
A bit of coding style improvement
Rewrite a piece of logic from parseFilename()
Merge pull request #122 from badescunicu/replace_underscores

 replace underscores with spaces when parsing track file name