add ReadTrack function generator
this is a lazy function that reads the tracks metadata from cue file
in small chunks at the time.
add small print statement to show the generated metadata.
The start and end of a track needs to be fixed.
Merge dardevelin's branch 'pythonification' of https://github.com/dardevelin/readcue into dardevelin-pythonification
Added code to get album title.
Changed getting track no from list to using find and rfind. Changed
stage to be set in the TRACK section instead of TITLE because that's
where the metadata begins.
Modified a comment
Removed print(stage) which was used to debug