async module added to the app
Modified the stub data attributes to match the real ones in the endpoints
Music loader added to the app bin, so it loads the
music tracks automatically when the app boots
Script loaders added to hit the users, listen and follows 
endpoints by demand
Makefile usage added
Log files ignored
Better exception description: use body attributes
instead of the generator
Music resource:
- Split generares to create an array of them
- Return record hash
Recommendations resource will return a hash list with an array of music tracks
Syntax refactor:
- Added missing `var` statements
- Added missing semicolons
- Deleted `global` statement from the DB declaration
Fixed generes return data to be an array