Note about the need for cover.jpg for embedding album art
Updated documentation
No default logging; only when --logfolder is given
(bug) Logging is already started when another process is detected
(bug) When a lossy folder path contains a trailing /, the cleanup proces is broken
Transcoder usage through command line parameters instead of conf-file
Added statistics (summary) after completion
Provide OS-independent separator while joining path + filename
Removed obsolete import
Embedding album art in transcoded files (mp3/ogg); some refactoring in functions
