Fixed FFmpeg memory leak (issue #53)
Many thanks to @lijuncode for coming up with this fix for issue #53 !
When FFmpeg is unable to receive a frame from the codec, the memory allocated to receive the frame should be freed. This was not being done before.
Info panel text is now copyable (issue #55)
Text in the detailed track info panel (on all tabs) is now selectable, and so can be copied. Thanks to @XhstormR for suggesting this improvement.
NOTE - Since the text in the info panel is in a table view, the text to be copied must first be clicked. That will put that row of the table in focus, allowing the user to copy the text.